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What makes something radioactive?

• Contaminated sewage

• Fighting with the Hulk

• Imagine dragons

• Unstable nucleus

What particle is released when an unstable isotope undergoes alpha radiation?

• a neutron

• an electron

• a photon of light

• a helium nucleus

Which type of radiation gives out electron?

• Alpha radiation

• Beta radiation

• Gamma radiation

What kind of radiation can be stopped by paper?

• Alpha radiation

• Beta radiation

• Gamma radiation

In order of most to least penetrating radiation, we have

• alpha, beta, gamma

• gamma, beta, alpha

• alpha, gamma, beta

• beta, alpha, gamma

List the types of radioactive decay from LARGEST to SMALLEST.

• alpha, beta, gamma

• alpha, gamma, beta

• beta, alpha, gamma

• gamma, alpha, beta

Which particles make up the nucleus of an atom?

• protons and neutrons

• electrons and protons

• electrons, protons, and neutrons

• electrons and neutrons

What causes an atom to be radioactive?

• It has unequal numbers of protons and electrons

• It has a positive charge

• Its nucleus is unstable

• It has a negative charge

What type of decay is shown here

²³⁸₉₂U ---> ²³⁴₉₀Th + ⁴₂He.

• alpha

• beta

• gamma

Identify the type of nuclear decay shown here

²¹⁴₈₃Bi → ⁰_-1e + ²¹⁴₈₄Po

• alpha

• beta

• gamma