A1 - Covalent Bonding

Question 1

Define a covalent bond

Answer 1

electrostatic attraction between shared pair of electrons and nuclei

Question 2

How many shared pairs of electrons are in a double bond

Answer 2

two

Question 3

What structure does diamond have?

Answer 3

Macromolecule

Question 4

What structure does H2O have?

Answer 4

Simple molecule

Question 5

What structure does Silicon Dioxide, SiO2 have?

Answer 5

Macromolecule

Question 6

What structure does graphene have?

Answer 6

Macromolecule

Question 7

What element is graphene made of?

Answer 7

Carbon

Question 8

What is the structure of Carbon dioxide. CO2?

Answer 8

Simple molecule

Question 9

What is the structure of ammonia, NH3

Answer 9

Simple molecule

Question 10

Which substance has a higher melting point?

Diamond or Carbon Dioxide

Answer 10

Diamond

Question 11

Which substance has a higher melting point?

Water, H2O or Graphene

Answer 11

Graphene

Question 12

Do macromolecules have a high or low melting point?

Answer 12

high

Question 13

Which has a higher melting point?

Ionic compounds or simple molecules

Answer 13

Ionic compounds

Question 14

Can simple molecules conduct electricity?

Answer 14

No

Question 15

Do simple molecules have high or low melting points?

Answer 15

low

Question 16

Which has higher melting points?

Simple molecules or macromolecules

Answer 16

macromolecules

Question 17

Can diamond conduct electricity?

Answer 17

No

Question 18

Can graphite conduct electricity?

Answer 18

Yes

Question 19

Why can graphite conduct electricity?

Answer 19

It has delocalised electrons which are free to move and carry a current

Question 20

Why does diamond have a high melting point?

Answer 20

Many strong covalent bonds which are hard to break

Question 21

Why do simple molecules have low melting points?

Answer 21

Weak intermolecular forces which are easy to break

Question 22

What is the structure of Boron?

Answer 22

Macromolecule