Radioactivity

1. a) This is gold on the periodic table:

How many protons does a gold atom have?

[1]

b) How many electrons does a gold atom have?

[1]

c) How many neutrons does a gold atom have?

[1]

2. Isotopes have a different number of __________.

[1]

3. a) Alpha and beta particles are _________ radiations

[1]

Ionising
Non-ionising

b) Radiation is emmited randomly from radioactive nuclei.

True or false?

[1]

True
Flase

4. Which type of radiation has the most penetrating power?

[1]

5. Name a way of detecting radiation.

[1]

6. What geographical feature means there are higher levels of background radiation in Cornwall?

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7. We measure radiation in becquerels. What is the abbreviated form of this unit?

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8. The count rate of a radioactive substance went from 1000 per minute to 250 per minute over 8 days.

In days, what is the half-life of this substance?

[1]

9. Name a danger of radiation to the human body.

[1]

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GCSE Physics - Radiation

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