Science - Metals Unit

Question 1

List me 5 metals and their uses

Answer 1

Any 5 from the following:
Gold Jewerly Ornaments
Copper Construction of water
pipes/electrical wires
Silver Cooking Utensils
Aluminium Bodies of trains or planes or sheet foil
Steel Bridges/Large Buildings
Iron To make steel
Mercury Liquid metal for planes
Sodium Trains/cars
Potassium Bells/Gong
Arsenic Coins
Antimony Iron nails
Bismuth Machines
Lead Buildings/Bridges
Magnesium Light weight for pipes
Lithium Low density and can be used for batteries
Osmium Fountain tip pens

Question 2

Define Flexible

Answer 2

can be stretched and hammered into shapes

Question 3

What is a shiny metal used for?

Answer 3

use for jewerly, ornaments or decorations

Question 4

What can a good conductor of heat be used for?

Answer 4

iron for clothes, cooking utensils

Question 5

What can a good conductor of electricity be used for

Answer 5

Wiring

Question 6

What can a strong metal be used for?

Answer 6

used for machinery, building material, chains

Question 7

What metals are magnetic?

Answer 7

only iron and iron alloys (mixture of metals)

Question 8

On the periodic table what is on the left, on the right and in between

Answer 8

On the periodic table metals are on the left, non-metals on the right and metalloids
between.

Question 9

Metals react with ______, ______ and other non-metals to form a single compound.

Answer 9

Metals react with oxygen, halogens and other non-metals to form a single compound.

Question 10

Lithium + oxygen –> ?

Answer 10

Lithium + oxygen –> Lithium oxide

Question 11

What is corrosion and what does it do?

Answer 11

Any reaction of oxygen at the surface of a metal and It forms a layer on the surface of the metal

Question 12

What is corrosion for?

Answer 12

For the layer to act as protection against more corrosion of the metal

Question 13

What metals can rust?

Answer 13

Only iron and steel can rust

Question 14

What 2 things are required for a metal to rust?

Answer 14

Rusting requires oxygen and water

Question 15

What does corrosion do to affect a metal

Answer 15

Rust flakes off and makes the metal weaker

Question 16

Suggest 3 ways you could prevent rust

Answer 16

Paint the metal
Oil the metal
Cover it with a layer of powder
Keep air and water away
Cover it with a thin layer of plastic
Cover it with a thin layer of another metal

Question 17

What is the word equation for rusting?

Answer 17

Iron + oxygen + water –> iron hydroxide

Question 18

What type of metals are very reactive with water?

Answer 18

Alkali metals are very reactive with water (lithium, potassium, sodium)

Question 19

What type of metals react slowly with water

Answer 19

Earth-alkali metals react slowly with water (magnesium, calcium)

Question 20

What type of metals mostly do not react with cold water

Answer 20

Transition metals mostly do not react with cold water (iron, zinc, aluminum)

Question 21

The reaction of a metal with acids gets ______ the more reactive it is

Answer 21

The reaction of a metal with acids gets faster the more reactive it is

Question 22

What is the lab test for hydrogen?

Answer 22

A burning wooden splint goes pop if it is put into a test tube of hydrogen. This is because the flame ignites the hydrogen, which burns explosively to make a loud sound.

Question 23

Sulfuric acid forms ______

Answer 23

Sulfuric acid forms sulfates

Question 24

Hydrochloric acid forms _________

Answer 24

Hydrochloric acid forms chlorides

Question 25

Nitric acid forms ______

Answer 25

Nitric acid forms nitrates

Question 26

Magnesium + nitric acid =
Sodium + Sulphur =
Aluminium + hydrochloric acid =

Answer 26

Magnesium + nitric acid = Magnesium nitrate
Sodium + Sulphur = Sodium sulphate
Aluminium + hydrochloric acid = Aluminium chloride