A piece of radioactive material contains 1000 atoms. If its half-life is 20 seconds, the time taken for 125 atoms to remain is

A piece of radioactive material contains 1000 atoms. If its half-life is 20 seconds, the time taken for 125 atoms to remain is

Options

A) 40 seconds

B) 20 seconds

C) 60 seconds >>>>>>>>>>>

D) 80 seconds

 

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