Atoms and radiation

Question 1

How is an alpha particle formed?

Answer 1

From two protons and two neutrons
So it has a mass number of four and an atomic number of 2

Question 2

What are Beta Particles?

Answer 2

Fast moving electrons

Question 3

TIP

Answer 3

When a Beta Particle is emitted from a nucleus, a neutron turns into a proton. The mass number of the nucleus remains the same , but the atomic number increases by 1

Question 4

When some nuclei decay by sending out an alpha or beta particle they also give out…

Answer 4

Gamma ray

Question 5

What is gamma ray

Answer 5

It’s an electromagnetic wave

Question 6

True or false?
Gamma Rays have no mass or charge

Answer 6

True

Question 7

All types of radiation cause…

Answer 7

ionisation

Question 8

What can alpha particles be stopped by?

Answer 8

Paper

Question 9

True or false? Alpha particles cause very heavy ionisation

Answer 9

True

Question 10

What are beta particles stopped by?

Answer 10

Aluminium

Question 11

What is gamma ray stopped by

Answer 11

Thick lead

Question 12

Imformation ; beta particles do not ionise as strongly as alpha particles,
Gamma rays only ionise very weakly and travel great distances through air

Question 13

What happens if Radiation get into our body?

Answer 13

Damage can occur onto cells and tissue

Question 14

Alpha ionising power and range in air?

Answer 14

Very strong, a few centimetres

Question 15

Beta ionising power and range in air?

Answer 15

A few meters, medium

Question 16

Gamma ray ionising power and range in air?

Answer 16

Great distances, weak

Question 17

The half life of a radioactive isotope

Answer 17

Is the time taken for the number of nuclei in a radioactive isotope to half.

Question 18

1 becquerel=

Answer 18

An emission 1particle/ second