C3

Question 1

Describe Ionic Bonding[5]

Answer 1

*Between Metals and Non-Metals.
*Metals lose electrons to form positive atoms.
*Non metals gain electrons to form negative ions.
*transfer of electrons
*Electrostatic force of attraction.

Question 2

Describe Covalent Bonding

Answer 2

• Between 2 metals
  *shared pair of electrons
  *held together by the electrostatic force of attraction between negatively and positively charged ions

Question 3

In ionic bonds, how do we display the data?

Answer 3

Dot and cross diagram.

Question 4

what is a dot and cross diagram?

Answer 4

Showing the amount of valence electrons using dots and crosses for different elements.

Question 5

covalent bond display structure.

Answer 5

1- Atoms on top
2-Number of valence Electrons
3-how many electrons it must gain.

Question 6

What is an Atom?

Answer 6

An atom is a neutral particle because it has an equal number of positively and negatively charged Electrons.

Question 7

What is an ion?

Answer 7

An Ion is a charged particle

Question 8

What is a molecule?

Answer 8

A group of atoms joined together

Question 9

What is a compound?

Answer 9

A compound is many molecules held together by chemical bonds

Question 10

Describe and Explain the melting point of giant ionic substances[3]

Answer 10

*High Melting Point
*Because strong electrostatic force of attraction between oppositely charged ions.
*require a lot of energy to overcome

Question 11

Describe and explain the melting point of simple covalent substances[3]

Answer 11

*small molecules
*weak intermolecular forces
*require a small amount of energy to overcome

Question 12

Describe and explain the melting point of giant metallic substances[3]

Answer 12

*High melting point
*Strong electrostatic force of attraction between positive metal ions and delocalised