GCSE Chemistry C1 - Section 1 - 3 Atoms, Limestone and Metals

Question 1

The charge of a neutron is?

Answer 1

neutral 0

Question 1

To calculate the number of neutrons??

Answer 1

Mass number - atomic number

Question 1

What are the ingredients of concrete?

Answer 1

Powdered cement, water, sand and crushed rock.

Question 2

What type of chemical reaction removes oxygen?

Answer 2

Reduction

Question 3

What are the ingredients of cement?

Answer 3

Powdered limestone and powdered clay

Question 3

Why is carbon able to help extract Iron, but not Sodium?

Answer 3

Carbon is more reactive than Iron but not Sodium.

Question 4

What is the main chemical in limestone?

Answer 4

Calcium Carbonate

Question 4

How do we test for carbon dioxide?

Answer 4

Limewater goes cloudy

Question 5

A carbonate + acid gives off which gas?

Answer 5

Carbon dioxide

Question 5

What is a metal ore?

Answer 5

A rock containing enough metal which is worth extracting (getting out the rock!).

Question 6

What are three disadvantages for building a limestone quarry?

Answer 6

1. Destruction of animal and plant habitats. 2. Noise and dust pollution. 3. Increased traffic could cause danger to local people.

Question 8

Calcium oxide + water –> ?

Answer 8

Calcium Hydroxide

Question 9

Why is pure iron not very useful?

Answer 9

Too soft

Question 9

What is phytomining?

Answer 9

Using plants to extract metal.

Question 10

What are the disadvantages of phytomining?

Answer 10

1. Plants take a long time to grow.

Question 11

Metal ions always have what charge?

Answer 11

positive

Question 13

What are the products of heating limestone (calcium carbonate)?

Answer 13

Calcium oxide (CaO) + Carbon dioxide (CO2)

Question 16

Non-metal ions always have what charge?

Answer 16

negative

Question 17

What is a mixture of metals known as?

Answer 17

An alloy

Question 19

The charge of a proton is?

Answer 19

positive +1

Question 20

What is electrolysis?

Answer 20

Extracting metals from solutions using electricity.

Question 21

What is bioleaching?

Answer 21

Using bacteria to extract metal.

Question 22

Breaking down a chemical using heat is known as?

Answer 22

Thermal decomposition

Question 23

The charge of an electrons is?

Answer 23

negative -1

Question 24

Describe the process of phytomining in 4 steps.

Answer 24

1. Crop/ plant grows and absorbs metal from soil. 2. Plant is harvested and burnt. 3. Plant ash is collected which contains metal. 4. Ash is smelted to release pure metal.

Question 25

What are the advantages of phytomining?

Answer 25

1. Plants absorb CO2 as they grow. 2. Can remove metal from low grade ores (ie ground where there are only small amounts of metal).

Question 26

What is smelting?

Answer 26

Heating a metal ore in a furnace with air to make pure metal.

Question 27

What are three advantages for building a limestone quarry?

Answer 27

1. Jobs are created for people to work at the quarry. 2. Useful building materials will be produced. 3. Roads will need to be improved to deal with extra traffic e.g. lorries etc.

Question 28

The central part of an atom is called the?

Answer 28

nucleus

Question 29

What is steel?

Answer 29

A mixture of iron and other metal(s)

Question 30

The order in which electrons fill the shells in an atom is?

Answer 30

2, 8, 8

Question 31

Where do we sxtract iron using crbon?

Answer 31

Blast furnace

Question 33

Balance this equation? H2 + O2 –> H2O

Answer 33

2H2 + O2 –> 2H2O

Question 34

What is the chemcial formula for Calcium Carbonate?

Answer 34

CaCO3

Question 35

Why are aluminium and titanium so useful? Give 3 reasons.

Answer 35

1. Corrosion resistant. 2. Low density. 3. Strong.