If it is known that the decay constant of radium is 1.3566 × 10-11 s – McqOptions

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1.	If it is known that the decay constant of radium is 1.3566 × 10-11 s-1 then find its half-life. (Given atomic mass of radium is 226.095 amu)
A.	1000 year
B.	1620 year
C.	1785 year
D.	1467 year
Answer» C. 1785 year

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