3. Periodicity

Question 1

Electronegativity

Answer 1

A measure of an atom’s ability to attract shared electrons to itself

Question 2

Ionisation energy

Answer 2

The energy required to remove an electron from a gaseous atom

Question 3

Electron affinity

Answer 3

The energy given out when an electron is added to a gaseous atom

Question 4

Basic oxide

Answer 4

One that will react with an acid to form a salt and, if soluble in water, will produce an alkaline solution

Question 5

Amphoteric oxide

Answer 5

One that reacts with both acids and bases

Question 6

Acidic oxide

Answer 6

One that reacts with bases/alkalis to form a salt and, if soluble in water, will produce an acidic solution

Question 7

Transition metal

Answer 7

An element which forms at least one stable ion with a partially-filled d sub-shell

Question 8

Ligands

Answer 8

Negative ions or neutral molecules which use lone pairs of electrons to bond to a transition metal ion to form a complex ion

Question 9

Complex ion

Answer 9

A central transition metal ion surrounded by ligands