Decay

Question 1

what does a alpha particle have and what does is it the same as

Answer 1

2 protons and 2 neutrons same as a nucleus of a helium atom

Question 2

How is alpha decay shown

Answer 2

4
HE
2

Question 3

what are the 2 rule for alpha decay

Answer 3

the atomic number must decreases by 2

the atomic number must decreases by 4

Question 4

what happens in beta decay

Answer 4

In beta decay, a neutron changes to a proton and an electron.

Question 5

what is the rule of beta decay

Answer 5

the atomic number increases by 1 but the mass number does not change.

Question 6

what is gamma decay

Answer 6

both the atomic number and the mass number are not changed at all.

Question 7

what happens when a nucleus when it is unstable

Answer 7

nucleus gives out radiation called radioactive decay

Question 8

what are isotopes

Answer 8

atoms of the same element with different numbers of neutrons.

Question 9

what does activity mean

Answer 9

The activity is the rate at which a source of unstable nuclei decay.

Question 10

how can activity be measured

Answer 10

Activity is measured in becquerel (Bq).
1 Bq = 1 decay per second.

Question 11

how can you measure the radioactivity of a source

Answer 11

geiger-muller tube