 Potassium-40 (source code)

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= Potassium-40
{title2=$^{40}_{19}\mathrm K$}
{wiki}

<Potassium-40> is a long-lived radioactive <isotope> with 19 <protons> and 21 <neutrons>. It can decay to <calcium-40> through <beta-minus decay>, or to <argon-40> through <electron capture> and a rare <beta-plus decay>. The argon-producing branch supports <potassium-argon dating>.

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