Week 4 part 3

Question 1

What is a metallic bond?

Answer 1

• The electrons in the outer shell of the metal are delocalised. There are strong electrostatic forces between the positive metal ions and the shared negative electrons.

Question 2

Why are most metals solids at room temperature?

Answer 2

• The strong electrostatic forces between the electrons and metal ions needs lots of energy to break.

Question 3

Why are metals good at conducting heat and electricity?

Answer 3

• The delocalised electrons carry heat and electricity throughout the metal

Question 4

Why are metals malleable?

Answer 4

• Because the layers can slide over each other

Question 5

Why are alloys harder then pure metals?

Answer 5

• Because when a metal is mixed with another metal, the elements have different sized atoms so it is harder for the layers to slide over each other.