Metals

Question 1

Why do metals have high melting & boiling points?

Answer 1

giant structure
many strong electrostatic forces of attraction between positive metal ions & sea of delocalised electrons that require a lot of energy to overcome

Question 2

Why are metals good conductors of electricity?

Answer 2

sea of delocalised electrons can move, so a current can travel through the metal

Question 3

Why are metals malleable?

Answer 3

easy to shape
layers of ordered positive ions slide over each other easily

Question 4

Why are metals ductile?

Answer 4

can be pulled into wires
layers of ordered positive ions slide over each other easily

Question 5

alloy

Answer 5

mixture of elements where at least 1 is metal

Question 6

Why are alloys so strong?

Answer 6

different sized atoms are added to structure
distorts layers in metal
layers can’t slide over each other as easily

Question 7

What properties does high carbon have?

Answer 7

very strong but very brittle

Question 8

What properties does low carbon have?

Answer 8

softer & easier to shape

Question 9

What properties does stainless steel have?

Answer 9

hard & resistant to corrosion