The masses of two radioactive substances are same and their half lives – McqOptions

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1.	The masses of two radioactive substances are same and their half lives are 1 year and 2 years respectively. The ratio of their activities after 6 years will be
A.	1 : 4
B.	1 : 2
C.	1 : 3
D.	1 : 6
Answer» B. 1 : 2

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