CCEA GCSE Single Award Science Unit 2 Chemistry quiz quiz

Proton +1, neutron 0, electron -1

Proton -1, neutron +1, electron 0

Proton 0, neutron +1, electron -1

Proton +1, neutron -1, electron 0

Atoms with the same number of neutrons but different protons

Atoms of the same element with different numbers of neutrons

Atoms that have lost or gained electrons

Atoms of different elements with the same mass

2, 10

2, 8, 8

2, 8, 2

8, 4

The solid has no ions, but melting creates them

The solid has covalent bonds that break on melting

Melting adds electrons to the structure

In the solid the ions cannot move; when molten they are free to move

Only the big numbers in front of formulae

Only the small subscripts inside formulae

Both the big numbers and the small subscripts

The chemical symbols themselves

4 g

20 g

12 g

It cannot be worked out

A salt and hydrogen only

A salt and water only

A salt, water and carbon dioxide

A salt and oxygen

It turns limewater milky

It relights a glowing splint

It bleaches damp litmus paper

It pops with a lighted splint

Aluminium is more reactive than carbon, so carbon cannot remove its oxygen

Aluminium is less reactive than carbon

Aluminium does not form an oxide

Electrolysis is always cheaper than reduction

Oxygen and carbon dioxide

Water and oxygen

Water and salt

Acid and oxygen

Particles get bigger

There are more particles present

Particles collide more often and a greater proportion of collisions succeed

The activation energy increases

Flat (horizontal)

Curving downwards

Going straight down

Steepest, because the rate is fastest

By the different boiling points of hydrocarbons of different chain lengths

By dissolving the fractions in water

By a magnet attracting the heavier fractions

By burning off the lighter fractions

Carbon monoxide and water

Carbon dioxide and water

Carbon and hydrogen

Sulfur dioxide and water

Carbon dioxide

Carbon monoxide

Sulfur dioxide

Water vapour