Chemistry - Structure and Bonding

Question 1

Covalent Molecules

Answer 1

2 non-metals sharing a pair of molecules

Question 2

What are the four allotropes of Carbon?

Answer 2

Diamond
Graphite
C60-fullerene
Graphene

Question 3

What allotrope of Carbon is one giant molecule?

Answer 3

Diamond

Question 4

_________ are colourless and
transparent. They sparkle and reflect light, which is why they are described as lustrous.

Answer 4

Diamonds

Question 5

__________ is extremely hard and has a high melting point. For this reason, it is very useful in cutting tools.

Answer 5

Diamonds

Question 6

Every atom in a diamond is bonded to its neighbours by _____ strong covalent bonds

Answer 6

Four

Question 7

Which allotrope of carbon contain layers of carbon atoms?

Answer 7

Graphite

Question 8

Which carbon allotrope is black, shiny and opaque?

Answer 8

Graphite

Question 9

Which carbon allotrope is used for pencil leads? And why is this allotrope chosen?

Answer 9

Graphite because the layers can easily slide off of each other and onto the paper.

Question 10

________ is insoluble in water. It has a high melting point and is a good conductor of electricity.

Answer 10

Graphite

Question 11

In graphite, each carbon atom is bonded into its layer with __________ strong covalent bonds.

Answer 11

Three

Question 12

What is a type of fullerene?

Answer 12

Nanotubes

Question 13

What is the structure of nanotubes?

Answer 13

Molecular-scale tubes of carbon arranged similarly to the layers in graphite.