Ionic Bonding

Question 1

What are compound ions made up of?

Answer 1

Groups of atoms with an overall charge

Question 2

Ionic bonding

Answer 2

Electrostatic attraction between oppositely charged ions

Question 3

What are ionic crystals?

Answer 3

Giant lattices of ions

Question 4

Structure of sodium chloride

Answer 4

Giant ionic lattice

Question 5

What do ionic bonding form between?

Answer 5

Metal & non-metal

Question 6

4 properties of ionic compounds

Answer 6

1) Conduct electricity when molten - not when solid
2) High melting points
3) Dissolve in water
4) Brittle crystals

Question 7

Conduct electricity when molten - not when solid

Answer 7

Ions in liquid are free to move. In solid, ions are fixed in position by strong ionic bonds

Question 8

Why do giant ionic lattices have high melting points?

Answer 8

Ions held together by strong electrostatic forces which take lots of energy to break

Question 9

How do lattices dissolve in water?

Answer 9

Water molecules are polar. Charged parts pull ions away from lattice, causing it to dissolve

Question 10

Brittle crystals

Answer 10

A small displacement causes contact between ions of the same charge. Like charges repel and so the structure shatters