C1

Question 1

isotopes have ____ number of protons and _____ number of neutrons

Answer 1

same different

Question 2

relative atomic mass is

Answer 2

average mass taking into account masses and abundance’s of all isotopes

Question 3

what is a mixture

Answer 3

not chemically bonded substance

Question 4

what ways was the periodic table sorted

Answer 4

physical and chemical properties

atomic weight

Question 5

in ____ dimitri mendeleev overcame some problems by placing ___ known elements and arranging them into a ____ of elements

Answer 5

1869
50
table

Question 6

dimitri left ____ to make sure elements with ____ properties stayed in the same groups

Answer 6

gaps

similar

Question 7

how is the modern periodic table arranged

Answer 7

increasing proton number

Question 8

properties of metals

Answer 8

strong
malleable
conductors of heat + electricity
high boil and melt
shiny

Question 9

properties of non metals

Answer 9

dull
brittle
don’t conduct
low density

Question 10

group 1 properties

Answer 10

soft
low density
1 electron outer shell

Question 11

what happens as you go down group 1

Answer 11

increasing reactivity, and boiling and melting points

Question 12

group 7 exist in ___

Answer 12

pairs

Question 13

what happens as you go down group 7

Answer 13

decreasing reactivity

higher points

Question 14

what are ions

Answer 14

charged particles when electrons are transferred

Question 15

what is ionic bonding

Answer 15

transfer of electrons

Question 16

when atoms lose or gain electrons theyre ___ attracted due to _____ forces

Answer 16

strongly

electrostatic

Question 17

giant ionic ____

Answer 17

lattice

Question 18

properties of ionic compounds

Answer 18

strong electrostatic forces
dissolve easily
not conductive

Question 19

what is the empirical formula

Answer 19

balanced number of atoms in a compound

Question 20

what is covalent bonding

Answer 20

sharing of electrons

non metals

Question 21

positive of dot and cross

Answer 21

which atoms electrons come from

Question 22

negative of dot and cross

Answer 22

don’t show size

arrangement

Question 23

displayed formula +

Answer 23

how they are connected

Question 24

displayed formula -

Answer 24

don’t show 3D model

Question 25

3D model +

Answer 25

arrangement

Question 26

3D model -

Answer 26

confusing

Question 27

simple molecular substance properties

Answer 27

``` strong covalent bonds attraction = weak melt = break intermolecular gas or liquid bigger = stronger forces don’t conduct ```

Question 28

what is a polymer

Answer 28

long chains of repeating units

Question 29

allotrope

Answer 29

different structural forms of the same element in same physical state

Question 30

name carbon allotropes

Answer 30

diamond graphite graphene fullerene

Question 31

diamond properties

Answer 31

giant saturated needs lots of energy doesn’t conduct

Question 32

graphite properties

Answer 32

3 covalent bonds no bonds between layers soft and slippery conducts

Question 33

graphene properties

Answer 33

hexagonal shapes 2D strong and light delocalised electrons

Question 34

fullerenes are

Answer 34

molecules made of carbon shaped like closed tubes or hollow balls

Question 35

buckminsterfullerene formula

Answer 35

C60

Question 36

buckminsterfullerene shapes

Answer 36

20 hexagons | 12 pentagons

Question 37

buckminsterfullerene uses

Answer 37

deliver drug lubricant nanotubes catalysts

Question 38

nanotube properties

Answer 38

high length : diameter conduct tensile strength light

Question 39

metallic bonding properties

Answer 39

electrostatic attraction is strong delocalised electrons regular structure

Question 40

what happens when alloys are made

Answer 40

different sized atoms distort layers

Question 41

mole definition

Answer 41

and amount of substance with avogadros constant number of particles

Question 42

abogadros constant

Answer 42

6.02 x 10^23

Question 43

a mole is equal to

Answer 43

Ar or Mr

Question 44

if mass changes in a reaction

Answer 44

gas involved

Question 45

ionic bonding is a strong _______ attraction

Answer 45

electrostatic