Question

Helium decays to form lithium. Which equation correctly describes this decay?

Answer 1

Answer:

⁴He₂ → ⁴Li₃ + ⁰e₋₁.

Explanation:

• Helium decays with the release of an electron to form a lithium nucleus.

• The number of nucleons is the same on both sides of the equation.

• A neutron decays to form a proton with the release of an electron.

• The atomic number increases from 2 to 3 while the atomic mass number stays the same at 4 nucleons.

Answer 2

Answer:

C

Explanation:

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