metals.

Question 1

what are ores?

Answer 1

type of rock where it is economic to extract the metal from

Question 2

how are high reactivity metals generally extracted from compounds and ores?

Answer 2

Electrolysis of metal compound, solution or molten

Question 3

how are lower reactivity metals generally extracted from compounds in ores?

Answer 3

Displacement, heating with carbon

Question 4

describe the structure of metals

Answer 4

Positive metal ions surrounded by sea of delocalised electrons

Question 5

Why do metals conduct electricity?

Answer 5

Did electrons carry charge which move through the structure

Question 6

Why do metals have high melting points?

Answer 6

Strong forces of attraction between ions and electrons, which take a lot of energy to overcome

Question 7

Why are metals, soft and malleable?

Answer 7

Layers slide over each other

Question 8

what is an alloy?

Answer 8

Mixture of metals with small amount of other elements

Question 9

why are harder than pure metals?

Answer 9

Layers can start every each other so easily as atoms are different sizes

Question 10

What is the rating for pure gold?

Answer 10

24 carat

Question 11

what’s wrong with pure gold?

Answer 11

Too soft

Question 12

What is the main metal in steel? What other elements are there and what are the uses of it?

Answer 12

Iron carbon and something else and is using cars or stainless steel

Question 13

what is the main metal of a gold alloy what other elements are in there and what are the uses?

Answer 13

Gold, silver, copper and zinc, jewellery

Question 14

What is the main metal in brass what other metals are there in brass and what are the uses?

Answer 14

Copper, zinc, killed bacteria, door knobs

Question 15

What is the main metal in bronze what other elements are there and what is the uses?

Answer 15

Copper, tin, statues, medals

Question 16

What is corrosion?

Answer 16

Many metals, corrode, reactive water and oxygen and are damaged as a result

Question 17

preventing corrosion- protective layer- how does it work and what are some examples?

Answer 17

Provides barrier which stops oxygen or water getting into the metal. Paint on car, oil on bike chain, 10 coating and steel can, plastic on the dishwasher tray.

Question 18

preventing corrosion- sacrificial protection- how does it work and what are examples of it?

Answer 18

more reactive metal reacts before iron or the steel.
Bag of magnesium powder connected to water tank .