GCSEPhysRadioactiveDecay13

Question 1

Alpha Decay Equation for Uranium-238

Answer 1

²³⁸U₉₂ → ²³⁴Th₉₀ + ⁴He₂

Question 2

What happens to A in any Alpha Decay?

Answer 2

A decreases by 4

Question 3

Alpha Particle Atomic Mass Number

Answer 3

4

Question 4

Beta particle range in air

Answer 4

several metres.

Question 5

Beta particle ionising power

Answer 5

moderate

Question 6

Beta particles can be stopped by

Answer 6

5mm of Aluminium

Question 7

The half-life of a radioactive isotope is the time taken for its activity to …???

Answer 7

fall by half

Question 8

Gamma ray charge

Answer 8

Zero

Question 9

Beta Decay equation for carbon 14

Answer 9

¹⁴C₆ —> ¹⁴N₇ + ⁰e₋₁

Question 10

Gamma Ray Ionising Power

Answer 10

Very weak

Question 11

How A changes in Gamma Decay

Answer 11

no change

Question 12

How A changes in beta decay

Answer 12

no change

Question 13

A beta particle is a fast-moving …?

Answer 13

electron

Question 14

Alpha Particles can be stopped by as little as a sheet of…?

Answer 14

paper

Question 15

Alpha Particle Ionising Power

Answer 15

Very strong

Question 16

Alpha Particle Charge

Answer 16

+2

Question 17

Gamma decay equation for Nickel-60

Answer 17

⁶⁰Ni₂₈*→⁶⁰Ni₂₈+γ

Question 18

Beta Particle Charge

Answer 18

-1

Question 19

Alpha particles have a range in air of a few …?

Answer 19

cm

Question 20

An Alpha particle is a …?

Answer 20

Helium nucleus

Question 21

The atomic mass number of a beta particle is …?

Answer 21

0

Question 22

A Gamma ray is an …?

Answer 22

electromagnetic wave

Question 23

The atomic mass number of a Gamma ray is …?

Answer 23

0

Question 24

The range in air of Gamma radiation is …?

Answer 24

extremely large

Question 25

Gamma radiation is greatly reduced by a thick block of ...???

Answer 25

Lead or concrete

Question 26

What happens to Z in any Alpha Decay?

Answer 26

Z decreases by 2

Question 27

How Z changes in Beta decay

Answer 27

Z increases by 1

Question 28

How Z changes in Gamma Decay

Answer 28

no change

Question 29

After a time of n half-lives the activity of a radioactive source will equal the original value divided by ...?

Answer 29

2ⁿ

Question 30

A graph of Activity against time for a radioactive sample is an ...??

Answer 30

exponential curve

Question 31

measured activity - background activity = ...??

Answer 31

corrected activity