Metals

Question 1

What are the 9 properties of metals

Answer 1

Strong, Density, Malleable, Ductile, Melting, Shiny, Magnetic, Sonorous, Alloy, Boiling

Question 2

What are the uses of strong

Answer 2

Bridges

Question 3

What is the use of density

Answer 3

Radiation shields

Question 4

What are malleable metals used for

Answer 4

Bending pipes

Question 5

What are ductile metals used for

Answer 5

Wires

Question 6

What is melting and boiling used for

Answer 6

Changes of state

Question 7

What are shiny metals used for

Answer 7

Jewellery

Question 8

What are magnetic metals used for?

Answer 8

Key components of motors, generators

Question 9

What are sonorous metals used for?

Answer 9

Instruments eg cymbals

Question 10

What are alloy metals used for?

Answer 10

Construct buildings

Question 11

What happens when alkali’s react with water

Answer 11

They produce heat, hydrogen gas, and the corresponding metal hydroxide

Question 12

What connects the reactivity of metals

Answer 12

The more reactive with water the more reactive the metal

Question 13

Test for hydrogen

Answer 13

Squeaky Pop

Question 14

salt and hydrogen form when a metal reacts with an acid

Answer 14

salt and hydrogen form when a metal reacts with an acid

Question 15

Reactivity series

Answer 15

Potassium, sodium, lithium, calcium magnesium aluminium carbon zinc iron lead hydrogen copper silver gold

Question 16

Copper silver do not react with acids

Answer 16

They are below hydrogen in the reactivity series. Hydrogen is in acids

Question 17

What are the salts

Answer 17

• hydrochloric acid — chloride
• sulfuric acid — sulfate
• nitric acid — nitrate

Question 18

Word equation for metals and acids

Answer 18

Metal + acid = salt and hydrogen

Question 19

What is a thermite reaction

Answer 19

Creates liquid iron for train tracks
Dangerous

Question 20

Displacement reaction

Answer 20

A more reactive metal takes the place of a less reactive metal from its compound

Question 21

Oxidisation

Answer 21

Gaining oxygen

Question 22

Reduction

Answer 22

Loosing oxygen

Question 23

Rusting conditions

Answer 23

Oxygen and water

Question 24

Word equation for rust

Answer 24

Iron+ water + oxygen =hydrated iron lll oxide

Question 25

Salt and rusting

Answer 25

It speeds rusting up

Question 26

The barrier method

Answer 26

The barrier method: the iron is coated with a barrier to prevent the iron from coming into contact with water and oxygen. The barrier can be a layer of paint, plastic, oil or grease. If the coating breaks, the iron rusts. It is also cheap

It can be used in the inside of a steel food can.

Question 27

Galvanising

Answer 27

The iron is coated with a layer of a more reactive metal usually zinc. The layer of zinc acts as a barrier to prevent iron from coming into contact with air and water. It can also acts as a sacrificial metal. See below. You can only use zinc and it is expensive

It can be used for buildings, bridges, gates and balconies

Question 28

Sacrificial protection

Answer 28

This means that it will react with oxygen more readily than iron because it higher up on the reactivity series. Zinc will be oxidised instead of the electrons. It is used in blocks. More expensive and needs to be replaced

It can be used for hulls of ships and underground tanks.