Respuesta :
The half-life of potassium-40 is about 1.25x10^9, or 1.25 billion, years. it undergoes beta decay and becomes argon-40. Equal amounts would be one half-life, so the sample is also 1.25x10^9 years old.
1.25x[tex]10^9[/tex] years old a rock that contains equal amounts of potassium-40 and argon-40.
What is half-life?
Half-life is the time taken for the radioactivity of a substance which is half to its original value.
The half-life of potassium-40 is about 1.25x[tex]10^9[/tex], or 1.25 billion, years. it undergoes beta decay and becomes argon-40. Equal amounts would be one half-life, so the sample is also 1.25x[tex]10^9[/tex] years old.
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