Year 7 Chemistry mid point test

Which of these things is an element?

• salt

• water

• oxygen

• air

The smallest part of an element is called:

• an atom.

• a compound.

• a molecule.

• an ion.

Which list contains three typical properties of metals?

• good conductor of heat, brittle, low melting point

• poor conductor of heat, strong, high melting point

• good conductor of electricity, strong, high melting point

• poor conductor of electricity, weak, low melting point

A compound contains:

• only one type of atom.

• at least two different elements chemically joined together.

• only one element.

• only two elements joined together.

The formula of ammonia is NH₃. Which TWO statement are true?

• An atom of ammonia contains 4 molecules.

• An atom of ammonia contains two different elements.

• A molecule of ammonia contains 4 atoms.

• A molecule of ammonia contains 4 different elements.

Which of these word equations is correct?

• copper + oxygen -> copper sulphate

• iron + chlorine -> iron oxide

• aluminium + iodine -> aluminium iodide

• sodium + sulphur ® sodium hydroxide

How many elements are there in the compound iron sulphide? (FeS)

• 1

• 2

• 3

• 0

The substances that you get at the end of a chemical reaction are called:

• reactants.

• chemicals.

• gases.

• products.

Which list contains the three gases which make up the air?

• hydrogen, oxygen, carbon dioxide

• argon, nitrogen, hydrogen

• nitrogen, oxygen, carbon dioxide

• argon, oxygen, carbon dioxide

Which substance:

is a gas at room temperature?

• sulphur

• oxygen

• magnesium

• water