C2-Bonding, Structure and Properties of Matter

Question 1

What are the three types of bonding?

Answer 1

Covalent, Ionic and Metallic

Question 2

How do covalent bonds form?

Answer 2

Shared pair of electrons

Question 3

What type of elements form
covalent bonds?

Answer 3

Two or more non-metals

Question 4

What structure is made up of
billions of atoms joined together by
covalent bonds?

Answer 4

Giant covalent structures

Question 5

Why do giant covalent substances
have high melting points?

Answer 5

Lots of energy required to break
strong covalent bonds between
atoms

Question 6

Why do most covalent structures not
conduct electricity?

Answer 6

No free eletrons to carry charge

Question 7

Which covalent structure is arranged
in layers and has free electrons?

Answer 7

Graphite

Question 8

Give two properties of graphene

Answer 8

Strong and conducts electricity

Question 9

Give one use of fullerenes

Answer 9

Lubricants, drug delivery and high tech
electronics

Question 10

What type of elements form ionic bonds?

Answer 10

Metals and non-metals

Question 11

What is an atom that has lost or gained an electron to become a charged particle?

Answer 11

Ion

Question 12

What charge do ions from group 2
elements form?

Answer 12

2+

Question 13

What charge do ions from group 7
elements form?

Answer 13

1-

Question 14

What forces hold ions together in an ionic bond?

Answer 14

Electrostatic

Question 15

What type of structure do giant ionic structures form?

Answer 15

Giant lattices

Question 16

Why do ionic structures have high
melting points?

Answer 16

Strong electrostatic forces need lots
of energy to overcome

Question 17

Why do ionic structures only conduct electricity when molten or dissolved?

Answer 17

Ions are free to move and carry charge when molten or dissolved, ions are fixed in a solid

Question 18

Descibe the structure of a strong metal

Answer 18

Layers of positive metal ions surrounded by sea of delocalised electrons

Question 19

What is an alloy?

Answer 19

Mixture of metal atoms with atoms of another element

Question 20

Describe the bonding in pure metals

Answer 20

Strong electrostatic forces between positive metal ions and delocalised electrons

Question 21

Why are pure metals malleble?

Answer 21

Layers easily slide over each other when force is applied

Question 22

Give two properties of a metal

Answer 22

Hard, shiny, malleable, ductile, sonorous and good conductors of thermal energy and electricity.

Question 23

Why can metals conduct eletricity?

Answer 23

Delocalised electrons free to move through whole structure and carry a charge

Question 24

What is a polymer?

Answer 24

Very large molecules made up of repeating monomer units

Question 25

Give one property of a simple covalent structure

Answer 25

Low melting and boiling point, gas at room temperature and don’t conduct electricity