SF3 Chapter 8 : Radioactivity (Set 1)

Which type of radiation has the shortest range?

• Alpha

• Beta

• Gamma

which form of radiation is stopped by aluminium but not paper?

• Alpha

• Beta

• Gamma

Which form of radiation is not deflected in an electric or magnetic field?

• Alpha

• Beta

• Gamma

half life is the time taken for ___ of the parent nuclei to decay.

• All

• Half

• None

If a radioactive substance had a half life of 5 days, what fraction would be left after 20 days?

• 1/2

• 1/4

• 1/8

• 1/16

Which is not one of the three types of radioactive decay?

• Alpha

• Delta

• Beta

• Gamma

Radioactivity is spontaneous and random.

• True

• False

Quick electron emissions are called.

• alpha decay

• beta decay

• gamma decay

• radioactive half life

What form of radioactive decay that reduces the atomic number or number of protons by 2?

• Alpha

• Beta

• Gamma

• None of the answers listed

What do we call the tiny core at the center of an atom?

• Electron

• Neutron

• Proton

• Nucleus