Compounds and chemical equations

Question 1

What is a compound?

Answer 1

Substances formed from 2 or more elements, the atoms of each are in fixed proportions throughout the compound and held together by chemical bonds

Question 2

How are bonds formed?

Answer 2

Giving away or taking or sharing electrons

Question 3

A compound which is formed from a metal + a non metal consists of what?

Answer 3

Ions

Question 4

What is an ionic bond?

Answer 4

Attraction between positive and negative ions

Question 5

When a metal and non metal react, which one gains electrons and which one loses electrons?

Answer 5

Metal loses electrons to form positive ions

Non metals gain electrons to form negative ions

Question 6

A compound formed from non metals consists of what?

Answer 6

Molecules

Question 7

What is a covalent bond?

Answer 7

A shared pair of electrons

Question 8

Write down the formals of these common compounds:

Carbon dioxide
Ammonia
Water
Sodium chloride
Carbon monoxide
Hydrochloric acid 
Calcium chloride
Sodium carbonate

Answer 8

CO2
NH3
H20
NaCl
CO
HCl
CaCl2
Na2CO3

Question 9

How are chemical changes shown?

Answer 9

Chemical equations