Question
Plutonium-239 is used in nuclear bombs. Determine the number of protons and neutrons in plutonium-239 and write its symbol in the form $\underset{\mathbf{Z}}{\mathbf{A}} \mathbf{X}$.
Step 1
The atomic number is the number of protons in an atom. For plutonium, the atomic number is 94. So, we have 94 protons. Show more…
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