Radioactivity - Nucleus - Isotope
Quiz - gcsescience.com.

1. What is radioactive decay?

a) Dead plants and animals become
         broken down in the soil

b) Bright lights given off by decaying plants

c) Bad smells given off by decaying plants

d) A change in a nucleus to make it more stable

 

2. Radioactive decay is

a) Always very noisy

b) Always happening at the same time of the day

c) A random process

d) No longer happening

 

3. The three types of radioactivity are called

a) Alpha, beta and gamma

b) Alpha, beta and delta

c) Alpha, delta and gamma

d) Hot, cold and energetic

 

4. The atomic number is

a) The number of atoms in 1g of carbon

b) The number of atoms in a nuclear reactor

c) The number of neutrons in an atom

d) The number of protons in an atom

 

5. The mass number is

a) The amount of atoms in 1g of carbon

b) The weight of atoms in 1g of carbon

c) The number of protons + neutrons in an atom

d) The number of protons + electrons in an atom

 

6. Isotopes are

a) Always radioactive substances

b) Never radioactive substances

c) Atoms of the same element with different numbers of neutrons

d) Atoms of the same element with different numbers of protons

 

7. A radioactive isotope is

a) A radioactive nucleus

b) A radioactive electron

c) A red hot rock

d) A blue cold rock

 

                       
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