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Isotopes

2. Atoms & Elements / Isotopes / Problem 5

Ra-226 occurs when U-238 undergoes radioactive decay. Determine the number of protons, electrons, and neutrons in Ra-226.

A

# of protons = 88
# of electrons = 88
# of neutrons = 138

B

# of protons = 86
# of electrons = 86
# of neutrons = 226

C

# of protons = 88
# of electrons = 88
# of neutrons = 226

D

# of protons = 86
# of electrons = 86
# of neutrons = 140

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