The reaction 24^Si + -1e rightarrow^24 Al is an example of alpha decay beta deca

Question

The reaction 24^Si + -1e rightarrow^24 Al is an example of alpha decay beta decay positron emission electron capture The following reaction is believed to occur in the intense heat and pressure of a star that will soon supernova:^16o +^4He rightarrow^20Ne. This is a alpha decay beta decay fission reaction fusion reaction Carbon 14 has a half-life of 5.73 times 10^3 years. Carbon-14 in a piece of living bone has an activity of 14 decays per minute per gram of bone. If a bone found under a parking lot in San Diego has an activity of 3 5decays per minute per gram of bone, then how long has the bone been dead?

Explanation / Answer

k = (1/t)ln(a/x)

a = 14

x = 3.5

(0.693/5730) = (1/t)ln(14/3.5)

t = 11464.434 years

answer: 11462.34 years

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