Paper 1 Topic 3

Question 1

What’s arrangement of solids

Answer 1

Very close , regular pattern , vibrate

Question 2

Arrangement of liquids

Answer 2

Close, no regular pattern , can move around each other

Question 3

Gases arrangement

Answer 3

Far apart , no pattern , move rapidly

Question 4

What’s density

Answer 4

Mass for a given volume

Question 5

What’s the density of solids

Answer 5

High as they are packed (so lots of mass for given volume)

Question 6

What’s the exception of solid density

Answer 6

Polystyrene- low density as it has an open structure + air spaces

Question 7

What’s internal energy

Answer 7

Energy stored in a system by the particles (total kinetic energy and potential energy)

Question 8

Solid-> liquid

Answer 8

Meting

Question 9

Liquid-> gas

Answer 9

Boiling

Question 10

Gas->liquid

Answer 10

Condensation

Question 11

Liquid->solid

Answer 11

Freezing

Question 12

Gas->solid

Answer 12

Sublimation

Question 13

What’s specific latent heat

Answer 13

Amount of energy required to change state of one kg of substance with no temperature change

Question 14

What’s specific latent heat of fusion

Answer 14

Energy required to change 1kg of substance from solid to liquid (with no temp change)

Question 15

What’s specific latent heat of vapourisstion

Answer 15

Energy required to change 1kg of a substance from liquid to vapour (with no temperature change)

Question 16

What’s particle motion like in gases

Answer 16

Random motion + very far apart

Question 17

Pressure of a gas is due to.. + what if we increase pressure

Answer 17

Particles colliding with the walls of container the gas is held in
No. Of collisions per second increase , energy of each collision increases (by increasing temp)

Question 18

Atom radius , nucleus

Answer 18

1x10^-10
1/10000 of an atom

Question 19

Proton charge + mass number

Answer 19

+1 , 1

Question 20

Neutron charge + mass number

Answer 20

0 , 1

Question 21

Electron charge + mass number

Answer 21

-1 , 1/2000

Question 22

What’s the top number and what’s the bottom

Answer 22

Top = mass number (protons + neutrons)
Bottom = atomic (number of protons and electrons)

Question 23

What’s an isotope

Answer 23

Atoms of same element but diff number of neutrons

Question 24

Whats the plum pudding model

Answer 24

Atoms is a ball of positive charge with negative electrons embedded in it

Question 25

What’s alpha scattering model

Answer 25

Alpha particles fired at gold foil

Question 26

What did the alpha scattering mode do

Answer 26

Most particles straight through, some defected , some bounced back

Question 27

What 3 things did the alpha scattering model prove

Answer 27

Straight through => atoms mostly empty space
Some deflected => centre of atom must have p+ charge
Some bounced back = mass of atom concentrated in centre (nucleus)