Definitions

Question 1

Relative isotopic mass

Answer 1

Mass of a single atom of an isotope compared to 1/12 of carbon 12

Question 2

Relative atomic mass

Answer 2

Weighted average mass of a single atom compared to 1/12 of carbon 12

Question 3

First ionisation energy

Answer 3

The first ionisation energy is the energy required to remove one mole of the most loosely held electrons from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.

Question 4

Successive ionisation energy

Answer 4

It is the energy needed to remove a second electron from each ion in 1 mole of gaseous 1+ ions to give gaseous 2+ ions.

Question 5

Metallic bonding

Answer 5

The strong electrostatic forces of attraction between metal ions and delocalised electrons

Question 6

Ionic bonding

Answer 6

The strong electrostatic attraction between oppositely charged ions

Question 7

Covalent bond

Answer 7

The strong electrostatic force of attraction between two positive nuclei and shared pair of electrons