Types of Radiation

Question 1

what are the types of radiation?

Answer 1

alpha
beta
gamma

Question 2

alpha particles are..

Answer 2

made of 2 protons and 2 neutrons (helium)

Question 3

beta particles are …

Answer 3

electrons which come from the nucleus

Question 4

gamma rays are …

Answer 4

high frequency electromagnetic waves

Question 5

range in air of alpha particles

Answer 5

4cm

Question 6

range in air of beta particles

Answer 6

30cm

Question 7

range in air of gamma rays

Answer 7

infinite

Question 8

alpha particles blocked by …

Answer 8

paper, skin

Question 9

beta particles blocked by …

Answer 9

thin aluminium

Question 10

gamma rays blocked by…

Answer 10

nothing but can be reduced by thick lead

Question 11

Do alpha particles have a high or low ionising power?

Answer 11

high

Question 12

do beta particles have a high or low ionising power?

Answer 12

low

Question 13

do gamma rays have a high or low ionising power?

Answer 13

very low

Question 14

are alpha particles deflected by magnetic field?

Answer 14

yes

Question 15

are beta particles deflected by magnetic field?

Answer 15

yes, other direction

Question 16

are gamma rays deflected by magnetic field?

Answer 16

no

Question 17

what happens when a nucleus emits an alpha particle?

Answer 17

loses two protons - so proton number decreases by 2

loses two neutrons - so mass number decreases by 4

Question 18

what happens when a nucleus emits an beta particle?

Answer 18

one of its neutrons turns into proton and electron and the electron is released - so mass number stays the same, and proton number increases by 1

Question 19

what happens when a nucleus emits a gamma ray?

Answer 19

there is no change to the nucleus because it is a wave not a particle