Chemistry

Front 1

what is an element

Back 1

substance made from only the same kind of atoms

Front 2

wats a molecule

Back 2

groups of atoms joined 2gether eg. O 2 &Cl 2

Front 3

lists some laws about gases

Back 3

daltons laws
boyle's laws
charles law

Front 4

wat does daltons law state

Back 4

if two or more gases are mixed, the pressure of the mixture is is the sum of the partial pressures of the gases in the mixtures

Front 5

wat are atoms

Back 5

very small particles which all things are made of

Front 6

wat is a compound

Back 6

a group of atoms that are not the same eg. H2O

Front 7

what is energy

Back 7

a force which makes things move and do work

Front 8

wat may energy be classified as

Back 8

kinetic and potential

Front 9

wat are some other forms of energy

Back 9

chemical, heat, electric, sound

Front 10

wat is energy measured in

Back 10

joules

Front 11

where is almost all our energy from

Back 11

the sun

Front 12

what is a pure substance

Back 12

on which contains only one type of material

Front 13

wat is a mixture

Back 13

a mixture which contains more than one types of material

Front 14

list an eg. of a mixture

Back 14

a glass of lemonade
and the air we breathe

Front 15

wat is a mixture of more that one solids called

Back 15

an alloy

Front 16

list an eg. of a mixture a solid and liquid

Back 16

jelly, milk

Front 17

eg. of a liquid and liquid

Back 17

salad dressing and wine

Front 18

eg. of gas and liquid

Back 18

sprays, foam, soft fizzy drinks

Front 19

eg of a mixture of gas and solid

Back 19

smoke

Front 20

eg. of a mixture of gas and gas

Back 20

air

Front 21

wat is a filtrate

Back 21

the liquid which comes out when filtering

Front 22

residue

Back 22

the remaining particles

Front 23

wat is decanting

Back 23

simply pouring the liquid off a solution and leaving the residue behind eg. sand and water

Front 24

wat is a suspension

Back 24

when a solid does not just sit a the bottom of a container with water bt instead is everywhere(suspnded)

Front 25

give an eg. of suspension

Back 25

dirty water

Front 26

what are immiscible liquids

Back 26

liquids which do not disolve in each other

Front 27

what is an emulsion

Back 27

when liquids have to shaken together for the to mix

Front 28

an eg. of an immiscible liquid is

Back 28

oil and water

Front 29

an eg. of a emulsion is

Back 29

an hair oil.

Front 30

wen a solid does not melt but instead changes from one state to another this is called a

Back 30

sublimation

Front 31

wat does chromatograhy mean

Back 31

'colour writing'

Front 32

wat is the pattern of spots on a paper called

Back 32

a chromatogram

Front 33

if a substance will dissolve in in a liquid we say it is

Back 33

soluble

Front 34

wat is a soluble solid called

Back 34

a solute

Front 35

wat liquid called

Back 35

a solvent

Front 36

a solvent + a solute ------>

Back 36

solution

Front 37

wat 3 things affect solubility

Back 37

1) the temperature,
2) mass of solute
3) mass of solvent

Front 38

wen is a solution said to be saturated

Back 38

when a solvent has dissolved as much solute as it can at a given temperature, and still has solute left (at the bottom)

Front 39

how do you know wen as much solute as possible has been dissolved

Back 39

some will be left over in the bottom

Front 40

wat shows the variations of solubility with temperature

Back 40

a solubility curve

Front 41

1000g of water is the same as how much dm3

Back 41

1dm3

Front 42

gases also dissolve in solvents meaning

Back 42

just wat is says gases disslove in solvents

Front 43

give an eg. of a gas which dissolves in a solvent

Back 43

chlorine in water
soft drinks which has carbon dioxide dissolved in solvent

Front 44

wat do u think happens wen a hot saturated solution cools?

Back 44

solid starts to fall out of the solution in the form of crystals this is called crystallisation