Bonding

Question 1

Why do atoms form bonds?

Answer 1

To achieve a stable electronic structure

Question 2

When is an ionic bond formed?

Answer 2

when there is a transfer of electrons

Question 3

An ionic bond is the result of…

Answer 3

Strong electrostatic forces of attraction between oppositely charged ions

Question 4

When is a covalent bond formed?

Answer 4

When there is bonding between non-metals

Question 5

Are covalent bonds strong?

Answer 5

yes

Question 6

What are compounds with covalent bonds called?

Answer 6

simple covalent molecules e.g H2

Question 7

What are the properties of simple covalent molecules?

Answer 7

• Low m.p and b.p

- Non- conductor of electricity

Question 8

What are the reasons for poor electrical conductivity in simple covalent molecules?

Answer 8

• exist as simple covalent molecules

- no mobile ions or electrons present`

Question 9

Why do simple covalent molecules have a low m.p and b.p?

Answer 9

• exist as simple covalent molecules
• with weak intermolecular forces
• which require little energy to overcome

Question 10

What are the properties for ionic compounds?

Answer 10

• High m.p and b.p
• Cannot conduct electricity in solid state
• Conducts electricity when in molten or dissolved state

Question 11

Explain why Ionic compounds have a high m.p and b.p?

Answer 11

• have a crystal lattice structure
• Strong electrostatic forces of attraction
• A lot of energy required to overcome the forces

Question 12

Explain the electrical conductivity of Ionic Compounds?

Answer 12

In solid state,
- ions held in fixed positions
- by strong electrostatic forces of attraction
- in crystal lattice structure
In molten or dissolved state,
- Strong electrostatic forces are broken
- ions are mobile