Chemical Reactions and lime stone

Question 1

Covalent Bonding

Answer 1

When two non-metals bond, Outermost electrons are shared . A pair of shared electrons forms a bond.

Question 2

Ionic Bonding

Answer 2

Metal and non-metal react. Metals form positive ions, Non-metals form negative ions. Opposite charges attract. Metals LOSE electrons Non Metals GAIN electrons.

Question 3

What is an ion?

Answer 3

Ions are formed when elements lose or gain electrons, they are charged particles.

Question 4

What is limestone made from?

Answer 4

Limestone is made mainly of Calcium Carbonate CaCO3. Formed from the remains of sea animals that lived millions of years ago.

Question 5

How do you get limestone out of the ground?

Answer 5

Limestone is quarried (dug out of the ground)

Question 6

What Is limestone used for?

Answer 6

It’s used for building materials and is used in the chemical industry and for cosmetics.

Question 7

What is thermal decomposition?

Answer 7

Heating limestone- Breaking down of a chemical by heating.

Question 8

Advantages of limes stone quarrying

Answer 8

Provide jobs
Lead to improved roads
Filled in to make fishing
When empty used as landfill sites

Question 9

Disadvantages to limestone quarrying

Answer 9

Destroys habitats
Increased emissions
Noisy & Dusty
Busier roads