Atoms and Radioactivity

Which ionising radiation is the heaviest?

• Alpha

• Beta

• Gamma

Why are some elements radioactive and some aren't?

• Because they are light

• Because they are heavy

• Because they are unstable

• Because they are stable

In order of most to least penetrating radiation we have

• Alpha , Beta,  Gamma
• Beta , Gamma , Alpha
• Gamma, Beta, Alpha
• Gamma, Alpha, Beta

Which type of radiation is the most ionising?

• alpha
• beta
• gamma

Which type of radiation is the least ionising?

• alpha
• beta
• gamma

What type of radiation can be stopped by a piece of paper?

• Alpha radiation
• Beta radiation
• Gamma radiation

What type of radiation can be stopped by a thick lead sheet?

• Alpha radiation

• Beta radiation

• gamma radiation

Which best describes gamma radiation?

• A helium nucleus.

• A fast moving electron.

• High frequency electromagnetic wave.

Made of 2 protons and 2 neutrons

• alpha
• beta
• gamma

A fast moving electron

• alpha
• beta
• gamma