Question

Determine if the following nuclides are stable or radioactive and predict the process most likely to increase their stability.

Nuclide Stable? Radioactive Process

¹⁸₁₀ Ne ______ ______________

³²₁₆ S ______    ______________

²³⁶₉₀ Th ______ _____________

¹²₅ B _______ _____________

optional answers for "Stable?": Stable or Radioactive

optional answers for "Radioactive Process": alpha decay, beta decay, positron emission, electron capture, gamma emission, or none.

Answer 1

1) ₁₀ Ne¹⁸ is unstable nuclide and can undergo 2 proton decay or positive beta decay to form Oxygen-16 and Fluorine-18 respectively.

Positron decay :    ₁₀ Ne¹⁸ ------------>    ₉F¹⁸ +₁⁰ / ₊₁e⁰+ o (neutrino)

Neon - 18    Fluorine -18 positron

2 Proton decay : ₁₀ Ne¹⁸ ------------> ₈O¹⁶ + 2 ₁H¹

2)    ₁₆S³² is a stable nuclide and does not undergo radioactive decay.

3) ₉₀Th²³⁶ is unstable nuclide and undergo beta decay to form Palladium-236

₉₀Th²³⁶ ---------> ₉₁ Pa ²³⁶ + _-1e⁰ + 0 (neutrino)

   Palladium -236 beta

4) ₅B¹² is unstable nuclide and undergo beta decay and also along with alpha decay to form carbon -12 and Berylllium-8 respectively.

   Beta decay : ₅B¹² ----------> ₆C¹² + _-1e⁰ + 0 (neutrino)

Carbon -12

   Combination of Alpha decay and beta decay:

₅B¹² ----------> ₄Be⁸ + ₂He⁴ + _-1e⁰

Beryllium - 8