Radioactivity:

Question 1

What is radioactive decay?

Answer 1

• Some isotopes have unstable nucleus’s.
• To become stable, the nucleus gives off radiation.
• ## Random process.

Question 2

What is the activity?

Answer 2

• Rate at which unstable nucleus’s decay.
• Measured in Bq.
• ## Measured using a Geiger-Muller Tube.

Question 3

What is the count rate?

Answer 3

Number of decays recorded each second by a detector.

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Question 4

What is an alpha particle?

Answer 4

• Same as a helium nucleus.

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Question 5

What is a beta particle?

Answer 5

• Electron ejected from the nucleus at a high speed.

- Formed inside of the nucleus when a nuetron changes into a proton and an electron.

Question 6

What are gamma rays?

Answer 6

• Type of electromagnetic radiation from the nucleus.

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Question 7

What other radiation is given out by unstable nuclues sometimes?

Answer 7

• • Nuetron.