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A radioactive nuclide has a ____ stable nucleus than a non-radioactive nucleus of the same element.

• more

• less

• identical

• small

Has a mass of 4 and a charge of +2

• Alpha
• Beta
• Gamma

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

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

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle
• beta particle
• gamma ray
• uranium

What is the symbol for an alpha particle?

• ⁴₂He
• ⁰_-1e
• ⁰₊₁ e
• ¹₀n

Gamma rays have

• no mass

• a huge mass

• a small mass

• an average mass

If an electron moves from n=4 to n=2 it ____

• absorbs energy

• releases energy

What electromagnetic wave has a lower frequency than the visible light?

• X-rays

• Gamma rays

• Infrared rays

• Ultraviolet rays