SP6

Question 1

Describe an early model of the atom.

Answer 1

J.J Thomson said positive nucleus with negativly charged electrons in it. (Plum pudding)

Question 2

Describe the Rutherford alpha particle scattering experiment

Answer 2

pass alpha particles through gold foil.

Question 3

What were the results of the rutherfors alpha particle and what did it show

Answer 3

alpha particles passed through gold. Showed most of mass in nucleus

Question 4

What is the relative mass of a proton

Answer 4

1

Question 5

what is the relative mass of a neutron

Answer 5

1

Question 6

what is the relative mass of a electron

Answer 6

1/1835

Question 7

Describe when electrons can change orbit.

Answer 7

when energy is passed through them

Question 8

what did niels bohr do

Answer 8

constructed a atom model stating that electrons can only be in certsin fixed orbits

Question 9

How is radon gas produced

Answer 9

produced by rocks that contain uranium

Question 10

What are some examples of background radiation

Answer 10

radon gas, food/drink, medical, cosmic rays

Question 11

how can you measure radioactivity

Answer 11

photographic filM or a Geiger muller tube(GM)

Question 12

how does photographic film show radioactivity

Answer 12

the darker the film os the higher the radiation

Question 13

what is one negative about photographic film

Answer 13

it takes a long time to develop

Question 14

How does a GM tube work?

Answer 14

Radiation passing through the tube ionises gas inside it

Question 15

What is the electronic configuration of an alpha particle

Answer 15

2 protons and 2 neutrons

Question 16

What is the relative mass of an alpha particle and the charge

Answer 16

4, +2

Question 17

Describe B- decay

Answer 17

a neutron changes into a proton and an electron.

Question 18

Describe B+ decay

Answer 18

proton become a neutron and a positron

Question 19

What s the units for measuring nuclear decay?

Answer 19

Becquerels(Bq)