OCR Gateway GCSE Chemistry A Particles (C1) overview quiz quiz

Far apart from each other and moving quickly in all directions at random

Close together but randomly arranged, able to move past each other

Spread far out from each other and completely stationary in fixed places

Close together in a regular arrangement, vibrating about fixed positions

Sublimation

Condensation

Deposition

Evaporation

Charge +1, mass 1

Charge 0, mass 1

Charge -1, mass negligible

Charge 0, mass negligible

11

12

23

34

Atoms of the very same element that happen to have different numbers of protons in the nucleus

Atoms of completely different elements that happen to share the very same mass number

Atoms of the same element with the same number of protons but different numbers of neutrons

Atoms of an element that simply have different numbers of electrons around the nucleus

35.0

35.5

36.5

37.5

The atom is mostly made up of completely empty space inside it

The electrons in the atom carry a small negative electric charge

Atoms are solid indivisible spheres that cannot be broken apart

The centre of the atom is tiny, dense and positively charged

2.8.7

2.7.8

8.8.1

2.15

Going down the group the single outer electron sits closer to the nucleus and is harder to lose

Going down the group the atoms steadily gain more and more outer electrons in their outer shell

The outer electron is further from the nucleus and more shielded, so it is lost more easily

The alkali metals simply get steadily lighter in mass as you move down the group from top to bottom

They have a completely empty outer electron shell

They each have just one outer electron that is easily lost

They are all liquids at normal room temperature and pressure

They have a full outer shell, which is very stable