slop 3

Question 1

describe the structure of a giant ionic lattice

Answer 1

strong electrostatic forces of attraction between oppositely charged ions acting in all directions

Question 2

boiling/melting points of IONIC substances

Answer 2

high

Question 3

why do ionic substances have high melting points

Answer 3

large amounts of energy needed to break the MANY strong BONDS

Question 4

When can ionic comppounds conduct electricity

Answer 4

when molten or dissolved as the ions will be free to move

Question 5

state bonding between NON-METALS

Answer 5

Covalent

Question 6

describe covalent bonding in terms of electrons

Answer 6

SHARING electrons

Question 7

Do small covalent substances have high or low boiling points

Answer 7

LOW boiling points

Question 8

Why do small molecules have low melting points?

Answer 8

The weak intermolecular forces are easily overcome by a small amount of energy

Question 9

State the trend in intermolecular forces as molecules get bigger

Answer 9

as the molecules get bigger, the INTERMOLECULAR forces get stronger

Question 10

Do small covalent molecules conduct electricity

Answer 10

No, (because no charged particles)

Question 11

State the type of bonding in metals

Answer 11

Metallic bonding

Question 12

Describe metallic bonding structure

Answer 12

Strong electrostatic forces of attraction between positive ions and DELOCALISED electrons

Question 13

State the general melting points of metals

Answer 13

High

Question 14

State the 4 properties of metals

Answer 14

Malleable, ductile (drawn in to a wire), good connectors of heat and electricity and high melting point

Question 15

why are metals good conductors of thermal energy

Answer 15

energy is transferred by delocalised electrons

Question 16

what is an alloy

Answer 16

a mixture of different metals

Question 17

describe why alloys are harder than pure metals

Answer 17

Layers of atoms are distorted so layers cannot easily slide over each other

Question 18

why are metals good conductors of electricity

Answer 18

delocalised electrons carry a charge and flow through the metal

Question 19

which element are diamond, graphite and fullerenes made from

Answer 19

carbon

Question 20

state the type of bonding between carbon atoms

Answer 20

covalent

Question 21

how many bonds does each carbon have in a diamond

Answer 21

4

Question 22

state 4 properties of a DIAMOND

Answer 22

very hard, high melting point, does not conduct electricity and insoluable

Question 23

how many bonds does each carbon have in GRAPHITE?

Answer 23

3

Question 24

why is graphene soft

Answer 24

it has weak intermolecular forces between the layers so layers slide over each other

Question 25

state 4 properties o GRAPHITE

Answer 25

good conductor of electricity and heat, soft, high melting point and insoluble

Question 26

what is one layer of graphite called

Answer 26

Graphene

Question 27

this a fullerene

Answer 27

molecules of carbon atoms with HOLLOW SHAPES

Question 28

what is the name of the fullerene that has 60 carbons

Answer 28

Buckminsterfullerene

Question 29

Describe a carbon nanotube

Answer 29

a cylindrical fullerene with a very high length to diameter ratio

Question 30

what are nanotubes used for

Answer 30

electronic, nanotechnology and materials

Question 31

what is the law of conservation of mass

Answer 31

no atoms are lost of made during a chemical reaction. The mass of the products is equal to the mass of the reactants.