Radioactive Decay, Nuclear Processes Review

Period

• 1
• 2
• 3
• 4
• 5

First Name

Last Name

Which statement below is true.

• There is 50% carbon 14 left at 5730 years.
• There is 25% carbon 14 left at 5730 years.
• There is 0% carbon 14 left at 28,650 years.

Based on the notes, what is radioactivity?

• Radioactivity is the spontaneous release of particles or energy from an atom due to the atom's instability.
• The emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
• Radioactivity is the release of energy from the decay of the nuclei of certain kinds of atoms and isotopes.

To defend yourself against a gamma particle you should use---.

• Paper
• Aluminum
• Lead
• Air

Radioactive decay occurs in...

• all elements.
• all isotopes.
• radioactive isotopes.
• Uranium and Potassium only.

A patient is given 100mg of Iodine-131. How much remains after 16 days?

• 50%
• 25%
• 12.5%
• 6.25%

What is the missing atom?

• Bk - 97
• Bk-247
• Np-239
• B - 1

What type of radioactive decay did this atom do

• alpha
• beta
• gamma