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Science

Radiation for life

What is radioactivity? - Test

1.

What is an alpha particle?

2.

What is a beta particle?

3.

What changes when a radioactive substance decays?

4.

How does the activity of a radioactive source change over time?

5.

A geiger counter records a count of 5000 in 25 seconds from a radioactive source. What is its activity?