Covalent bonding

Question 1

Occurs between

Answer 1

Non metal + non metal

Question 2

What is the definition of a covalent bond

Answer 2

A shared pair of electron between two non metal atoms

Question 3

How are the atoms held together

Answer 3

Because of the electrostatic fore of attraction between the positive nuclei of each atom and the negatively charged electrons

Question 4

What is a diatomic element

Answer 4

Element made up of two of the same atoms

Question 5

Name all the diatomic element and which have double/triple bonds

Answer 5

All of group 7
Oxygen
Nitrogen
Hydrogen

Question 6

Why do they turn into the 4 shapes

Answer 6

Electrons repel when next to another shared one. This is because they are negatively charged.

Question 7

What are the 4 shapes they turn into

Answer 7

Tetrahedral
Triagonal pyramidal
Angular
Linear

Question 8

Name 4 key points about covalent molecular bonds

Answer 8

• low melting points
• do not dissolve in water
• do not conduct electricity - no charged particles
• lots of CB make a covalent network
• only a few make a discrete

Question 9

Name 3 covalent networks

Answer 9

• boron
• carbon
• silicon

Question 10

Name 2 covalent network compounds

Answer 10

• silicon dioxide

- silicon carbide