radiation

Question 1

what is an isotope

Answer 1

atoms of an element with a different number of neutrons

Question 2

what’s the atomic number of an atom

Answer 2

number of protons

Question 3

what is the nucleon number of an atom

Answer 3

the number of protons and neutrons

Question 4

what’s the charger of an atoms nucleus

Answer 4

positive

Question 5

what is background radiation

Answer 5

constant radiation we are exposed to

Question 6

Name 3 sources of background radiation

Answer 6

foods rocks hospitals

Question 7

give two dangers of ionising radiation

Answer 7

can damage tissues, can cause mutations

Question 8

Which form of radiation is most dangerous inside the body?

Answer 8

alpha

Question 9

two ways that radiation can be detected

Answer 9

Photographic film Geiger-Muller tube

Question 10

alpha particle made of ?

Answer 10

2 neutrons 2 protons

Question 11

beta negative particle

Answer 11

an electron release from the nucleus

Question 12

beta positive particle

Answer 12

a positron released from the nucleus

Question 13

what is a gamma ray

Answer 13

a wave, electromagnetic radiation

Question 14

what can stop alpha particles

Answer 14

a thin sheet of paper

Question 15

what can stop beta particles

Answer 15

a sheet of aluminium

Question 16

the process of beta negative decay

Answer 16

a neutron changes into a proton and an electron

Question 17

how does beta negative affect the mass number of an elecment

Answer 17

unchanged

Question 18

how does beta negative decay affect the atomic number

Answer 18

increases by 1

Question 19

define half life

Answer 19

the time it takes for the number of nuclei of the isotope to halve

Question 20

what units is activity measured in

Answer 20

bq becequerels