metallic bonding

Question 1

describe the bonding in pure metals

Answer 1

1.positive metal ions
2.arranged in layers
3.surrounded by sea of delocalised electrons

Question 2

explain why metals are good conductors of heat and electricity

Answer 2

1.the delocalised electrons are free to move and carry charge (electricity)/and energy (heat)
2.through the whole structure

Question 3

explain why metals are malleable

Answer 3

•pure metals are soft
•the layers of atoms are able to slide over each other so metals can be bent and shaped

Question 4

why do metals have high boiling and melting points?

Answer 4

•the metallic bonds are strong
•need a lot of energy to break these bonds

Question 5

why are alloys harder than pure metals?

Answer 5

1.the metals ions are different sizes.
2.this distorts the layers.
3.this makes alloys harder/stronger than pure metals

Question 6

define ‘alloys’

Answer 6

made of two or more different metals