1g. Covalent Bonding

Question 1

How are covalent bonds formed?

Answer 1

A covalent bond is formed between 2 non-metal atoms by sharing electrons in order to fill their outer shell

Question 2

What is covalent bonding?

Answer 2

A strong attraction between a shared pair of electrons and 2 nuclei

Question 3

Why do simple substances have low melting points?

Answer 3

Because the forces of attraction between molecules are weak and easy to overcome

Question 4

Why does the boiling point increase when the relative mass increases?

Answer 4

Because larger molecules (more mass) have more forces of attraction to break

Question 5

why substances with giant covalent structures are solids with high melting and boiling points

Answer 5

Because they have a giant covalent structure with many strong covalent bonds that require a lot of energy to break.

Question 6

What are allotropes?

Answer 6

Allotropes are different forms of the same element

Question 7

Examples of allotropes

Answer 7

Diamond, graphite, C60 fullerene

Question 8

Electric current is…

Answer 8

A flow of charged particles that can move

Question 9

Covalent compounds can/can’t conduct electricty

Answer 9

Covalent compounds do not conduct electricity