OL nuclear

A radioactive source emits radiation that can pass through a sheet of paper but not through thick aluminium. What does this show about the radiation?

• It is alpha-particles.

• It is beta-particles.

• It is gamma-rays.

• It is a mixture of alpha-particles and gamma-rays

Which line in the table describes the nature of an alpha-particle and a gamma-ray?

• A

• B

• C

• D

What is the half-life of this radioactive substance?

• 5700 years

• 11400 years

• 17100 years

• 22800 years

The risk of internal radiation exposure comes from:

• A source of ionising radiation inside the body

• An exposure to neutrons

• An exposure to ionising radiation outside of the body

What charge is an alpha particle?

• It's a wave, it has no charge
• Neutral (no charge)
• Positively charged.
• Negatively charged.

What device detects radiation?

• A Muller-Corner tube.
• A Geiger-Muller tube.
• A U-tube.
• A Rutherford tube.

What material can be used to absorb alpha radiation?

• Thin aluminium (a few mm thick)
• Thick lead or concrete
• A piece of wood
• A sheet of paper

What is the range of alpha radiation in air?

• A few centimetres (up to 5 cm)
• About 1 metre
• 100 metres
• More than 1km (almost infinite)

What material can be used to absorb beta radiation?

• Thick lead or concrete
• Thin aluminium (a few mm thick)
• A sheet of paper
• A piece of wood

What is the range of beta radiation in air

• A few centimetres (up to 5 cm)

• A few metres

• 100 metres

• More than 1km (almost infinite)