Physics test year 10 - 10/06/22

Question 1

Radioactive Decay

Answer 1

The nucleus of the isotope will emit Radiation so they can become more stable

Question 2

Nuclear Radiation - Alpha

Answer 2

Made of two protons and two neutrons. Stopped by skin, paper and a couple of cm of air

Question 3

Overall charge and mass of alpha radiation

Answer 3

Charge = +2

mass = 4

Question 4

Nuclear Radiation - Beta

Answer 4

Made of a fast-moving electron. Stopped by a thin sheet of aluminium

Question 5

Overall charge and mass of Beta radiation

Answer 5

Charge = -1
Mass = 1/2000

Question 6

Nuclear Radiation - Gamma

Answer 6

Not a particle, but a fast, high-energy electromagnetic wave. Thick led reduces Gamma.

Question 7

Overall charge and mass of Gamma

Answer 7

Charge = 0
mass = 0

Question 8

Ionisation

Answer 8

where radiation “knocks off” electrons from an atom. (This can lead to cancer in cells)

Question 9

Most ionising to least penetrating

Answer 9

Alpha - Beta - Gamma

Question 10

Most penetrating to least ionising

Answer 10

Gamma - Beta - Alpha

Question 11

Exponential Decay

Answer 11

The change gets smaller as the number gets lower

Question 12

Half-life

Answer 12

The time taken for the activity of a radioactive source to halve. (Longer half-life, less likely to Decay) It takes the same time to halve each time

Question 13

Contamination

Answer 13

An object or body contains a small amount of a radioactive isotope. If something is exposed to ionising radiation, it does not become radioactive

Question 14

Irradiation

Answer 14

An object or a body is exposed to nuclear radiation