Nuclear chemistry is the study of the breakup of unstable nuclei, which results in the emission of radiation and energy. There are three types of radiation; alpha (α), beta (β) and gamma (γ).

Which type of radiation is positively charged?

Alpha (α)

Beta (β)

Gamma (γ)

What determines how radioactive a nucleus will be?

The proton:electron ratio

The proton:neutron ratio

The neutron:electron ratio

What would the penetrative limit of gamma (γ) radiation be?

A few centimetres of air

A sheet of aluminium foil

Thick concrete

Which type of radiation can be represented by the particle shown?

What type of particle does X represent in the equation shown?

Which of the following would reduce the half-life of a radioisotope?

The mass of the radioisotope present

The temperature the radioisotope is stored at

Nothing affects the half-life of a radioisotope

Which radioisotope is used to date the age of once living materials?

carbon-12

carbon-13

carbon-14

After 24 days, the mass of a radioisotope was found to be one quarter its original mass. What is the half-life of the radioisotope?

4 days

6 days

12 days

A medical radioisotope has a half life of 1.5 hours. Its radioactivity was recorded as 10,000 counts min^{-1} at 9am. What will the count rate be by 3pm?

625 counts min^{-1}

1250 counts min^{-1}

2500 counts min^{-1}