Bonding

Question 1

Define metallic bonding

Answer 1

Electrostatic attraction between positive metal ions and delocalisted electrons

Question 2

Describe the properties of metals as conductors?

Answer 2

Need mobile ions or e-, as electron cloud is movile, free e- are free to move, e- attached to positive end are replaced by those from negative end, mobile e- cloud allows conduction

Question 3

Describe properties of metals as malleable?

Answer 3

Can be hammered into sheets and drawn into rods and wires. When beaten into shape free electorn cloud continues to bind ions together

Question 4

Describe properties of metals with high BP?

Answer 4

Electron cloud densitry increases due to more e- donated per atom so ions are held more strongly. Decreases when atoms are bigger as cloud is less effective at holding them together.

Question 5

Whats an alloy?

Answer 5

Mix of metals in different proportions

Question 6

Define covalent bonding

Answer 6

shared e- pairs with one e* being supplied by each atom either side of the bond