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6 Radioactivity

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Question 17

An equation for the alpha decay of a plutonium nucleus has been written with an error.

94235Pu→92239U+24He {}^{235}_{94}\mathrm{Pu}\rightarrow{}^{239}_{92}\mathrm{U}+{}^{4}_{2}\mathrm{He} 94235​Pu→92239​U+24​He

Which correction gives a balanced equation?

[1]
A

Interchange the charge numbers 94 and 92.

B

Interchange 235 with 239 and 94 with 92.

C

Move 24He{}^{4}_{2}\mathrm{He}24​He to the left-hand side.

D

Interchange the mass numbers 235 and 239.

Markscheme

6 Radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6 Radioactivity

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