In a sample of a radioactive substance, what fraction of the initial nuceli will remain undecayed after a time `t=T//2` , where

In a sample of a radioactive substance, what fraction of the initial nuceli will remain undecayed after a time `t=T//2` , where T=half -life of radioactive substance?
A. `(1)/sqrt(2))`
B. `(1)/(2sqrt2))`
C. `(1)/(4)`
D. `(1)/(sqrt(2-1))`

In a sample of a radioactive substance, what fraction of the initial nuceli will remain undecayed after a time `t=T//2` , where T=half -life of radioa

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