Chemical bonding

Question 1

Noble gases

Answer 1

Elements that belong to the group 0
Has complete outer shell which makes them stable and unreactive

Question 2

Why do atoms need to react

Answer 2

Most other elements are reactive and unstable because they do not have a complete outer shell
So they gain, lose and share electrons to attain the complete shell

Question 3

Ionic bonding

Answer 3

An atom loses or gain electrons from another element to attain a noble gases configuration

Question 4

Covalent bonding

Answer 4

An atom shares its electrons with another element to attain a noble gas configuration

Question 5

An ion

Answer 5

Is formed when an atom loses or gain electrons

Question 6

A metal atom

Answer 6

Loses its electrons to form a positive charge ion called cations

Question 7

A non metal atom

Answer 7

Gains electrons to form a negative charge toon called anions

Question 8

Properties of ionic bonding

Answer 8

1. Giant crystal lattice structure
   - Have strong electrostatic forces of attraction
   So large amount of energy
   is needed to overcome this forces of attraction

Question 9

Properties of ionic bonding (2)

Answer 9

Have high melting points
Non volatile
Exists as solid in room temperature
2. Soluble in water but not in organic substances
Water molecules are attracted to ions, this attraction weaken the forces of attraction between ions
3. Conduct electricity in molten and aqueous state
The ions and electrons are mobile, so electric conductivity to take place

Question 10

Properties of covalent bonding

Answer 10

1. Low melting point
   As it has weak intermolecular forces
2. Does not dissolve in water but dissolve in organic solvent
3. Does not conduct electricity In all states
   As all

Question 11

Properties of covalent bonding

Answer 11

1. Low melting point
   As it has weak intermolecular forces
2. Does not dissolve in water but dissolve in organic solvent
3. Does not conduct electricity In all states
   As all electrons are not mobile