Which element has the chemical symbol Ni?
Nickel Click to see the answer
CH4 is the chemical symbol for which gas?
Which of these building materials is damaged by acid rain?
Which element has the chemical symbol Ti?
What state is fluorine in at room temperature?
Which of these is NOT true of calcium?
Brown in colour
What in particular is it that gives fireworks their myriad of colors?
Metallic compounds Click to see the answer
Where do most minerals come from?
Beneath Earth's crust
What name is given to atoms of the same element that have different atomic weights?
Most plastics are what?
If a chemical compound's name ends in '-ate' as in 'calcium carbonate' which element does it contain?
Calcium is displayed on the Periodic Tables as?
As a solid melts what happens to the temperature?
Stays the same
What is the process called when some molecules of water turn into gas?
When solids reach their melting points they become what?
How many neutrons is there in a Hydrogen (H) atom?
0 Click to see the answer
What is the common name for the compound with the chemical formula NaHCO3?
Chlorine, bromine and iodine are members of which group of chemical elements?
The oil used in the froth floatation process is?
Which of these is NOT true of gases?
Cannot be squashed
H2O contains how many elements?
What is a benefit of a limestone quarry?
Substances initially involved in a chemical reaction are known as what?
Water is made up of hydrogen and what else?
The solid state of water is known as what?
What type of substances do we get from substances called 'ores'?
Which is most dense?
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is known as who's law?
Henry's Click to see the answer
What chemical element has the symbol Pb?
When water is cooled what happens?
Which of these is not an ingredient in concrete?
Which is the only metal that is in liquid form at room temperature?
Which element has the atomic number 21?
The property of lasting a long time before wearing out is know as what?
Which of these liquids boils at 80.1 C?
Spectroscopy is a branch of chemistry concerning what?
Of these elements, which is the most toxic to humans?
Why is tungsten a good metal for electric light bulb filaments?
High melting point
What is the opposite of alkaline?
Why is titanium expensive to extract from its ore?
The major constituent of air is which gas?
How many forms of radioactivity are there?
Why can gold be found in the Earth's crust in its native state?
It's unreactive Click to see the answer
What is the pH value of seawater?
In 2009, 13 years after it was first discovered, what name was given to chemical element 112 in the Periodic Table?
What substances can convection happen in?
Liquids and gases
Steel is a what?
Which of these chemicals is inert?
What is an extremely poisonous oily liquid alkaloid that turns brown on exposure to air?
The left hand side of the Periodic tables is made up of?
Which colorless liquid is found in all living matter?
How many natural noble gases are there?
What is considered to be the opposite of acidic?
S is the symbol of which chemical element?
What is the chemical symbol for carbon?
Which of these common gases is made up from more than one chemical element?
Which type of plastic can be molded, melted, and then remolded?
At standard temperature and pressure, how many of the 118 elements in the Periodic Table are liquids?
In chemistry, what name is given to a substance which forms a caustic or corrosive solution in water?
In chemistry, what name is given to the smallest particle of a substance that can exist on its own?
Which of these metals is stored in paraffin to prevent it spontaneously igniting?
Sodium Click to see the answer
Pb is the symbol of which chemical element?
Europium originated from the name of which Continent?
Asbestos, feldspar and clay are all examples of which type of mineral?
Which of these unreactive metals does not need to be extracted from compounds?
High strength in tension is a good property for a material used to make what?
Limestone heated with clay forms what substance?
Something without a defined shape or volume is known as?
When water is heated it does what?
Can diamonds be made synthetically?
In chemistry, the change of state called 'sublimation' happens between which of these?
Solid and gas
Which silvery-white metal has the chemical symbol Pd?
The most commonly used bleaching agent is?
What do the letters 'AMU' stand for?
Atomic Mass Unit
How can calcium carbonate be decomposed?
Which of these is a chemical element?
What is the common British name for zinc carbonate?
The most extensive, commercially useful source of thorium as monazite sand occurs in India at?
The metal that is used as a catalyst in the hydrogenation of oils is?
Which of the following is not a greenhouse gas?
Which is an example of a chemical reaction?
Which compound has the chemical formula H2O?
Water Click to see the answer
The heat energy produced when the human body metabolises 1 gram of fat is?
Naturally occurring rocks that provide a starting point for the manufacture of metals are what?
The change in a substance from a liquid to a solid state is called what?
Over long periods while under extreme heat and pressure, graphite turns into what?
What gas is given off by pouring dilute euphoric acid on to granulated zinc?
If liquid Nitrogen (H2) was poured out at room temperature it would?
What keeps the water in swimming pools clean?
Which of these elements is more predominant in the atmosphere?
What is the pH value of toothpaste?
PVC is made up of carbon, hydrogen and what else?
What type of molecule is CH3OH?
Which of these is NOT an elemental gas?
In chemistry, what name is given to a positively charged ion?
What is the second element in the periodic table?
Which of the following needs to be constant for enzymes to work?
Helium came from the Greek word 'Helios' meaning what?
The most abundant protein in the human body is?
What is the chemical symbol for Magnesium?
In chemistry what does a Bu group indicate
What is the chemical symbol for uranium?
In chemistry, what color flame is produced by a compound containing sodium?
What name is given to a substance which reacts with an acid to form a salt plus water?
Which metal makes up approximately 90% of the alloy, Pinchbeck?
The two main metals in the earth's core are nickel and what?
Iron Click to see the answer
Molecules are made up of?
What do we call the compounds that contain only carbon and hydrogen atoms?
Which of these elements is not a noble gas?
Which mixture is typically made up of 75% potassium nitrate, 13% charcoal and 12% sulphur?
What color vapour does iodine give off when heated?
What is formed when ethene reacts with steam?
What is the missing form of radioactivity, Alpha, Beta and …?
On the pH scale, what is the value of water?
Which is an example of a crystal lattice?
What is the most common use of Uranium?
The periodic table is arranged in a series of columns, called what?
Which of these is not a metal?
Which of these is a gas?
Which of these can be used as a test for carbon dioxide?
At standard temperature and pressure, how many of the 118 elements in the Periodic Table are gases?
What is the chemical symbol for Gallium?
Crystals are made up of what?
When a solid changes to a liquid it is called what?
Polyamide is better known as what?
Which colorless, odourless light gas is used to lift airships?
HCl is what sort of compound?
Which of these is an important property of the material used to make tights?
What will happen to the pressure inside of a sealed tube if you raise the temperature?
Which gas has the chemical formula CH4?
Fossils are found mostly in which type of rock?
What is the more common name for sodium hydroxide?
What name is given to an atom or group of atoms that carry an electrical charge?
Ion Click to see the answer
Which of these compounds can be used to neutralise acid?
Which gas is the second lightest element?
An acid is a substance that produces?
Hydrogen Ions In Water
Which process allows large hydrocarbons to be broken down into smaller hydrocarbons?
Water freezes at what temperature?
What sort of elements combine to form an alloy?
What is the chemical symbol for Fermium?
A carcinogen is a chemical that can cause what?
In degrees Celsius, at what temperature does the sea start to freeze?
Pure water has a pH level of around what?
Which chemical element is the main constituent of photographic emulsions?
Which of these non-metals is a good conductor of electricity?
Which number group in the Periodic Table contains oxygen?
Which of these is an acid?
Which silvery-white metal has the chemical symbol Sn?
What is the chemical equation for calcium carbonate?
Which alloy is made from tin and lead?
Which element comes between Mendelevium and Lawrencium in the Periodic Table?
Which acid gives the common stinging nettle its sting?
Oxygen, Carbon, Hydrogen and Nitrogen make up approximately what percentage of the human body?
Robert Bunsen introduced what piece of laboratory equipment in 1855?
Which of these have a positive charge?
Which of these metals is used to plate others to prevent corrosion?
Which element in the Periodic Table has the lowest atomic weight?
When was the element rutherfordium discovered?
Which word is missing from the sentence: diamond and graphite are two main....of carbon?
When two objects are rubbed together and become charged, what moves between them?
Which of these elements are yellow?
How is Sodium Hypochlorite more commonly known?
What is the chemical symbol for Lawrencium?
Lr Click to see the answer
Which of these elements is always radioactive?
What two elements make up water?
Hydrogen & Oxygen
What is the ratio of hydrogen to nitrogen atoms in ammonia?
3 to 1
U is the symbol of which chemical element?
What is dry ice made from?
Which chemical element has the symbol Ra?
Which of these gases is used in light bulbs because it doesn't burn?
Which pungent gas has the chemical formula NH3?
In chemical reactions, what name is given to the addition of hydrogen to an element or compound?
When a gas reaches its condensation point it becomes a what?
Name a force that keeps molecules together?
How many electrons in a Hydrogen (H) atom?
When atoms and molecules cluster in a regular pattern they form?
Gadolinium (Gd) is named after which chemist?
What does a catalyst do to a reaction?
Speed it up
What temperature does water boil at when at sea level?
Who attempted to arrange the elements using the octave as a basis in 1864?
Which of these elements is a liquid at room temperature?
Which two letters indicate a measure of the acidity or basicity of a substance?
Who is famous for his work on periodic table?
The FDA has set a reference daily intake of how many minerals?
Acids have a pH where?
Where on the periodic table would you located the noble gases?
Marie Curie discovered which element, represented by Po on the Periodic Table?
What name is given to the different levels of electrons that are found around an atomic nucleus?
What color flame do sodium compounds burn with?
If a substance is weakly acidic, what color will it turn universal indicator?
The periodic table is arranged in a series of rows, called what?
The vulcanization of rubber is known as what?
What is H2O more commonly known as?
How do you produce calcium oxide from calcium carbonate?
What two elements combine to make water?
Hydrogen and oxygen
What is the chemical symbol for Bromine?
Br Click to see the answer
At what number in the Periodic Table would you find Einsteinium?
Three of these chemicals are gaseous at room temperature, which is the odd one out?
Which gas makes up 0.03 per cent of the air we breathe?
Which element has the atomic number 1?
Copper and tin mix to create which alloy?
The mineral containing both magnesium and calcium is?
Dolomite Click to see the answer
A 'buckyball' is an allotrope of which element ?
What industrial chemical is made by the Haber-Bosch process?
Approximately how many molecules thick is a piece of paper?
The most abundant rare gas in the atmosphere is?
N is the symbol of which chemical element?
Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be?
What happens to layers of metal ions when the metal is bent?
Slide over each other
Bronze is a mix of how many metals?
Which of these is a fundamental rule of chemistry?
Acid+Base -> Salt+Water Click to see the answer
How many chemical elements are there in the group known as the lanthanides?
Whereabouts does the group of elements known as the Actinides appear in the Periodic Table?
Which crystalline hydrocarbon is used to make mothballs?
Approximately how many different organic chemical compounds are currently known?
Which of these liquids boils at 78.2 C?
What is the pH value of ant venom?
When was the element bohrium discovered?
What is the second most abundant element in the Universe?
By which name is the chemical with the formula D2O better known?
If iodine is dropped on food that contains starch, what color does it turn?
Incomplete combustion can produce black particles of what?
Which of these gases is the densest?
Chlorine Click to see the answer
Which element is present in all organic compounds?
How many different elements are there in CH3COOH?
In chemistry, the science of 'kinetics' studies the rate of what?
What is the chemical symbol for Cobalt?
Which of the four sub-species of tiger has the alternative name, Amur?
Which chemical element takes its name from the Greek word for the sun?
Steel is a mixture of iron with what else?
What state is the chemical 'ethanol' at standard temperature and pressure?
Which of these will melt at 57 degrees C?
Au is the chemical symbol for what?
Which adjective describes elements with a higher atomic number than uranium?
Which of these substances has a melting point of 197 degrees C?
What substance has the chemical formula NH3?
The carbon allotrope the 'buckyball' is named after Buckminster Fuller who is not a scientist but is a what?
Which process describes a solid converting to a gas without passing through a liquid state?
Sublimation Click to see the answer
What is the fourth most abundant element in the universe in terms of mass?
The inherited traits of an organism are controlled by?
What is Hg the chemical symbol for?
Which of these elements has the lowest density?
What is osmoregulation control of?
An 'alloy' is a mixture of what?
Which of these elements' chemical symbols comes first alphabetically?
For which type of plastic is the chemical reaction irreversible?
What resource is extracted by 'Fracking'?
Limestone is mostly made of what?
Which of the following is the most malleable metal?
What is calcium sulphate more commonly known as?
Plaster of Paris
If a substance is described as anhydrous, what does this mean?
It does not contain water
In chemistry, the conversion of a liquid to a vapour below its boiling point is called what?
Persistent organic pollutants (POPs) are so dangerous because they do not do what?
The luster of a metal is due to its?
Presence Of Free Electrons
Fe is the chemical symbol for what?
How many carats are there in chemically pure gold?
24 Click to see the answer
How many electrons does carbon have in its outer shell?
What is the pH value of washing soda?
The metallurgical process in which a metal is obtained in a fused state is called?
Used in baking, which of these chemical elements is NOT found in bicarbonate of soda?
Which chemical element has the symbol Pu?
Recycling old aluminum uses what percentage of the energy used to create it new?
How many atoms each of carbon and hydrogen make up a benzene ring?
In an element the number of protons is equal to the number of what?
Copper can be extracted from ores by a process known as what?
What is the chemical symbol for lead?
Which element has the lowest freezing point of all substances?
What name is given to horizontal rows of elements in the Period Table?
Fullerene is an allotrope of which element?
Which two elements combine to make common salt?
Sodium and chlorine
The National Chemical Laboratory is situated in?
The most important ore of aluminium is?
What orbits the nucleus of an atom?
Which of the following gases is used for the artificial ripening of green fruit?
Which element has a melting point of 327 degrees C?
Which chemical element is present in pure alcohol but not in water ?
Which element's chemical symbol is F?
Fluorine Click to see the answer
Which element is the only one in diamond and graphite?
Which of these substances has the highest melting point?
Which of these B's is the chemical element?
Chemically, which of these naturally occurring substances is NOT organic?
Which of these is a member of the Nitrogen group of elements?
Which of these is NOT a gas at standard temperature and pressure?
The study of the composition, properties and behavior of matter is called what?
What color flame do copper compounds burn with?
Why is PVC a better material for window frames than wood?
Which of these elements has a single letter chemical symbol?
What is the atomic number of iodine?
The number of electrons presents in H+ is?
The hardest form of carbon is?
What element is found in all acids?
What is the atomic mass of hydrogen
Which type of chemical contains no oxygen?
How many different elements occur naturally?
Which metal alloy contains copper and usually tin?
Three of these materials are solid at room temperature, which is the odd one out?
Which of these elements appears latest in the Periodic Table?
Which of these is a gas?
Which element has the atomic number 31?
What is the chemical symbol for Platinum?
Which of these is not a type of steel?
Tungsten Click to see the answer
Which chemical element is found in all proteins?
Which of these is a chemical element?
Which element is found in bones, shells and teeth?
In a reaction known as a 'reduction', what has been removed from one chemical by another?
What is the most common metal found on Earth?
What is the chemical symbol for Dubnium?
Retinol is the chemical name for which vitamin?
What's the name of the dye that is used in chemistry to test the acidity of a substance?
What is the common name for the compound with the chemical formula K2CO3?
PVC is an example of what type of plastic?
Which gas is used to fill novelty balloons?
What is the common name for the compound Hydrogen Hydroxide?
How are the elements Helium, Neon, Argon, Krypton, Xenon and Radon collectively known?
Which radioactive metal is represented by the chemical symbol Ac?
Which two elements make up the gas ammonia?
Which element has the highest melting point known?
Which gas did Humphry Davy experiment with in 1800 only to discover its humorous side-effects?
The molecule which has the highest percentage of ionic character among the following is?
To what temperature, in degrees Celsius, would you have to heat a diamond before it melted?
What percentage of the body is made up of Oxygen?
K is the chemical symbol for potassium derived from its Latin name which is...?
Which chemical element is always required for combustion to take place?
Metals can be extracted using which of these processes?
Man first used which metal?
Which of these is often used in electrical wiring and plumbing?
In chemistry, which of these pairs are two words for the same thing ?
Base and alkali
C is the symbol of which chemical element?
Carbon Click to see the answer
In chemistry, which metal is indicated by a flame test producing a lilac flame?
Which chemical element is named after the formulator of the Theory of Relativity?
What is it called when a solid changes directly into a gas?
What are chemicals containing a benzene ring often known as?
What name is given to any substance which cannot be broken down any further by chemical methods?
Which of these gases appears earliest in the Periodic Table?
Which poisonous element is represented by the chemical symbol As?
Which of these scientists does not have a chemical element named after them?
Which elements are good conductors of heat and electricity?
Which of these is an alloy?
What is the chemical symbol for Mercury?
An example of a strong acid is?
What was the first synthetic fiber?
If a substance has a pH of 6, what is it?
Groups in the periodic table are columns of what?
In chemistry, protons, neutrons and electrons basically make up which sort of elements?
All of them
Which element has the chemical symbol Ba?
Which of these is a chemical element?
What does an ionic bond involve in terms of electrons?
Which of these metals is low density and resistant to corrosion?
What is the chemical symbol for titanium?
What is the highest atomically numbered element in the lanthanide group?
Salt, diamond and coal are all examples of what?
Which elements make up sugars such as lactose and glucose?
Carbon hydrogen oxgen
Spot the chemical element ...
Which of these metals can not be extracted in a blast furnace?
What type of molecule is C2H2?
What paper is used to test acid and alkali?
Where is an oil fractionating column hottest?
Chemically a cyanide is a compound that contains which two elements triple bonded together?
Carbon and nitrogen
CuSO4 is the chemical formula for the blue/green crystals of which compound?
Which of these is NOT an organic compound?
Which element gets its chemical symbol from hydragyrum, its former name meaning 'watery liquid' ?
If a substance has a pH of 13, what is it?
What is the pH value of apple juice?
3 Click to see the answer
What is produced in the Haber-Bosch process?
Which of these elements appears earliest in the Periodic Table?
Photosynthesis is a chemical process through which plants produce?
What is the main constituent of limestone?
The element symbol for potassium is?
How many chemical elements begin with the letter Z?
2 Click to see the answer
The main active constituent of tea and coffee is?
Which chemical element is the main source of nuclear energy?
What is sodium chloride more commonly known as?
In comparison with steel, what is pure iron like?
Which of these is NOT one of the inert gases?
What is the opposite of the word 'alkali'?
Which fuel releases the most carbon dioxide when used?
Which of these describes what salt does in water?
Which chemical element has the symbol 'K'?
Potassium Click to see the answer
Which of these gases is the least?
Which element has a relative atomic mass of 1?
Which of these gases is mainly responsible for acid rain?
Typically, a non-metallic element will be which of these things?
Which of these is a chemical element?
Which of these elements was discovered in 1250?
Which is the only substance on Earth which is naturally present in solid, liquid and gaseous form?
Magma, spewed out in volcanic eruptions during the Earth's early life and solidified into hard rocks called?
What is NaCl the chemical formula for?
Hydrochloric acid is a solution of which gas?
Which gas can be used to fill balloons, and to effect a comedy voice if inhaled ...?
What is the chemical symbol for Americium?
Am Click to see the answer
Which acid has the formula HNO3?
When was the element ununbium discovered?
What element is responsible for an 'eggy' smell?
What is the atomic mass of oxygen?
What type of structure is silicon dioxide?
When was the element hassium discovered?
Which element has the chemical symbol Br?
Which C is tin oxide ore?
What molecules do we breathe out?
PVC is an example of a what plastic?
Which of these is NOT true of helium?
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope is left behind?
Which of these would you be most likely to use in a chemistry lab?
Round bottom flask
When was the element dubnium discovered?
What is the main use of the chemical ammonia?
Fertiliser Click to see the answer
Which element has the chemical symbol Hg?
Which chemical element has the Atomic Number Two?
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of?
The Periodic Table
What more common name is given to 'electropositive' chemical elements?
A suspension of which compound in water forms Milk of Magnesia?
In terms of nuclear decay, what is the half-life of Strontium-90?
Which of the following is an example of a carbohydrate?
What is the ratio of hydrogen to sulphur to oxygen atoms in sulphuric acid?
Which of these metals has the highest melting point?
Of which semi-precious stone is Nephrite a variety?
What metal has the chemical symbol Pb?
Dry Ice is the sold form of which gas?
Which of these metals can be added to gold to make 'white gold'?
What must an element readily gain or lose in order to be classed as 'reactive'?
Why can polymers be difficult to dispose of?
Don't break down
Which of these elements has the lowest melting point?
Which element is used in computer chips?
What state is bromine in at room temperature?
Liquid Click to see the answer
Milk is which of the following?
What happens to iron oxide in a blast furnace?
What name is given to vertical columns of elements in the Period Table?
Alpha particles are the nuclei of which chemical element's atoms?
What is common table salt made of?
Which of these elements has a single letter chemical symbol?
Which of these is defined as a chemical substance that consists of just one type of atom?
What basically is an 'alloy' a combination of?
Two or more metals
In chemistry, substances known as salts always contain what?
Which of these elements has a full outer shell of electrons?
What color is the powder lead carbonate?
What is mayonnaise an example of?
Two or more elements or compounds not chemically combined are known as a what?
What name is given to a solid when it is being dissolved in a liquid?
Which metal is extracted from the mineral cinnabar?
What is the chemical symbol for Iodine?
What is NaCl the chemical formula of?
The chemical substance sometimes referred to as the 'universal solvent' is?
Which chemical element is named after the inventor of dynamite?
Copper is often useful because it does not react with what?
Which gaseous element was first called 'dephlogistaicated air'?
Oxygen Click to see the answer
Which of these is NOT the chemical symbol of one of the elements in the Periodic Table?
When magma cools slowly what sort of crystals form?
What gas makes people who breathe it talk with squeaky voices?
Plasticizers are added to PVC to make it more what?
Soft And Flexible
Which is the only d-block lanthanide?
Which chemical element has the symbol Mn?
In chemistry, what is another term for a common or non-systematic name given to a substance or group of substances?
Which of these substances is insoluble in water?
What is the pH value of the digestive juices?
Which of these chemical elements is NOT a liquid at standard temperature and pressure?
Which element doesn't concern people studying inorganic chemistry?
Which chemical is also known as grape sugar or blood sugar?
The method that cannot be used for removing permanent hardness of water is?
What chemical element has the symbol Sn?
Deuterium is an isotope of which gas?
The gas used in the manufacture of vanaspati from vegetable oil is?
What is the pH value of rainwater?
Which of these is a chemical element?
Which gas with the chemical formula C2H2 is widely used in welding?
Which of these is not an alloy of iron?
What color is the mineral cobalt?
Which element is named after the Greek word for 'green'?
The most electropositive element among the following is?
Fe is the symbol of which chemical element?
Which subatomic particles determine the reactivity of a chemical element?
What is the chemical symbol for sodium?
In chemistry, regarding solutions, what is the opposite of 'dilute'?
Misch metal' a substance that ignites when scratched are widely used in what?
A material which can be deformed permanently by heat and pressure is called a?
What ancient piece of linen did scientists examine for 120 hours in 1978?
Shroud of Turin
W is the chemical symbol for which metal?
What is the atomic number for magnesium?
What collective name is given to the six gases Helium, Argon, Krypton, Xenon, Neon and Radon?
Noble or inert
The products of complete combustion of a hydrocarbon are carbon dioxide and what?
Which familiar gas occurs naturally in oil wells, and as marsh gas?
Which is the compound in lodestone that makes it magnetic?
Which of these is a renewable energy source that can be used to make electricity?
Which two elements combine to make ammonia?
Nitrogen and hydrogen
A Hydronium ion is?
What is the opposite of alkali?