Compounds and Reactants.

Question 1

Model.

Answer 1

A diagram or three dimensional object that makes an idea easier to understand.

Question 2

Ratio.

Answer 2

A link between two values, e.g. 2:1

Question 3

Formula.

Answer 3

The chemical symbols and numbers that show how many atoms of each element a substance contains.

Question 4

Atom.

Answer 4

The basic building block of an element that cannot be chemically broken down

Question 5

Element.

Answer 5

A substance made up of only one type of atom.

Question 6

Molecule.

Answer 6

Two or more atoms held together by strong chemical bonds.

Question 7

Compound.

Answer 7

Two or more elements chemically joined together, such as water (H2O)

Question 8

Fuel.

Answer 8

A material that is burned, for the purpose of generating heat and energy.

Question 9

Reaction.

Answer 9

A process which changes substances by the rearrangement of their atoms.

Question 10

Chemical Equation.

Answer 10

A chemical reaction written in terms of reactants and products.

Question 11

Burning.

Answer 11

The reaction of fuels with oxygen that produces heat and energy.

Question 12

Acid.

Answer 12

A substance with a pH lower than 7.

Question 13

Product.

Answer 13

A substance formed from a chemical reaction.

Question 14

Base.

Answer 14

Reacts with an acid to neutralise it.

Question 15

Carbonate.

Answer 15

A type of compound containing carbon and oxygen.

Question 16

Organic compound.

Answer 16

A compound that contains carbon.

Question 17

Polymer.

Answer 17

A large molecule, made up of a very long chain, of smaller molecules.

Question 18

Oxidation.

Answer 18

The reaction of a substance with oxygen that increases the amount of oxygen contained in a compound.

Question 19

Stable.

Answer 19

Unlikely to break up.

Question 20

Thermal decomposition.

Answer 20

When one substance is changed into at least two new substances due to heating

Question 21

Reactants.

Answer 21

Starting substances in a chemical reaction.