Unit 9

Question 1

1. What are the physical properties of metals?

Answer 1

Solid at RT (except Mercury) shiny, malleable, ductile, sonorous, electrical and thermal conductors

Question 2

Why do metals conduct electricity when solid or liquid?

Answer 2

Theres delocalised electrons which can conduct electricity

Question 3

3. Which metals react with water?

Answer 3

K, Na, Li, Ca, Mg

Question 4

4. Write a general word equation for the reaction of metal with water

Answer 4

Metal + water → metal hydroxide + hydrogen

Question 5

5. Write a balanced chemical equation for the reaction of a metal with water e.g. lithium

Answer 5

2Li + 2H2O → 2LiOH + H2

Question 6

6. Write a full ionic equation for the above reaction

Answer 6

Li(s) +2H2O(l) → 2Li+(aq) + 2OH- (aq) + H2(g)