C3 Year11 Revision

Question 1

Metals

Answer 1

Elements that form positive ions

Question 2

Formation of non-metal ions

Answer 2

Atoms gain electrons

Question 3

Charge on non-metal ions

Answer 3

negative

Question 4

Group 1 ions charge

Answer 4

+1

Question 5

Group 2 ions charge

Answer 5

+2

Question 6

Group 6 ions charge

Answer 6

-2

Question 7

Group 7 ions charge

Answer 7

-1

Question 8

Giant structure

Answer 8

A huge 3D network of atoms or ions

Question 9

lattice

Answer 9

Regular arrangement of particles.

Question 10

Giant ionic lattice

Answer 10

A huge, 3D, regular structure of oppositely charged ions, held together by electrostatic forces.

Question 11

Examples of Ionic compounds

Answer 11

NaCl, MgO

Question 12

Ionic formula

Answer 12

the simplest whole number ratio of the ions in a giant ionic lattice

Question 13

Covalent bond

Answer 13

A shared pair of electrons

Question 14

Molecule

Answer 14

A group of two or more atoms held together by covalent bonds

Question 15

Examples of giant covalent structures

Answer 15

Diamond, graphite, silicon dioxide

Question 16

Limitations of dot and cross diagrams

Answer 16

Do not show the 3D shape of a molecule

Question 17

Molecular formula

Answer 17

A chemical formula of a shows the kinds and numbers of atoms present in a molecule

Question 18

Giant covalent structure

Answer 18

A huge 3D network of covalently bonded atoms

Question 19

Double covalent bond

Answer 19

A bond in which two atoms share two pairs of electrons

Question 20

Delocalised electrons

Answer 20

an electron that is able to move freely throughout a structure

Question 21

Electrostatic forces of attraction

Answer 21

Strong forces of attraction between oppositely charged particles

Question 22

Metallic bonding

Answer 22

A lattice of positive metal ions surrounded by delocalised outer electrons, held together by strong electrostatic forces of attraction

Question 23

Melting and boiling points of metallic substances

Answer 23

high

Question 24

Reason for metals high melting and boiling points

Answer 24

Strong electrostatic forces between positive metal ions and negative delocalised electrons

Question 25

Reason for metals being malleable

Answer 25

Layers of metal ions can slide over each other

Question 26

Reason alloys are harder than pure metals

Answer 26

Different sized atoms disrupt the layers of ions, preventing layers from sliding

Question 27

Reason metals conduct heat well

Answer 27

Delocalised electrons can transfer heat energy quickly

Question 28

Reason metals conduct electricity well

Answer 28

Delocalised electrons can carry electrical charge through the structure.

Question 29

Number of bonds between atoms in diamond

Answer 29

4

Question 30

Allotrope

Answer 30

Different forms of the same element

Question 31

Number of bonds between atoms in graphite

Answer 31

3

Question 32

Properties of diamond

Answer 32

Translucent, Hard, High melting point, Does not conduct electricity

Question 33

Uses of diamond

Answer 33

cutting tools and jewellery

Question 34

Properties of graphite

Answer 34

Soft, Slippery, good conductor of heat and electricity

Question 35

Reason graphite is soft

Answer 35

Weak forces between layers which can slide over each other.

Question 36

Reason graphite and graphene conduct electricity

Answer 36

One spare electron is delocalised and can carry charge through the layer

Question 37

Graphene

Answer 37

A single layer of graphite one atom thick.

Question 38

Uses of graphene

Answer 38

Electronics and composites

Question 39

Composite

Answer 39

Materials made of two or more different materials, containing a matrix and a reinforcement.

Question 40

Fullerene

Answer 40

A large carbon molecule with a hollow shape

Question 41

Buckminsterfullerene

Answer 41

Carbon molecule C60, 60 carbon atoms arranged in the form of hollow sphere

Question 42

Carbon nanotubes

Answer 42

Tiny, hollow tubes made of carbon atoms with a high length to diameter ratio

Question 43

Properties of carbon nanotubes

Answer 43

High tensile strength, high electrical and thermal conductivity

Question 44

Uses of carbon nanotubes

Answer 44

Electronics, strong materials