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प्रश्न
A radiative element has N0 number of nuclei at t = 0. The number of nuclei remaining after half of a half-life (that is, at time t = `1/2 "T" _(1/2)`).
पर्याय
`"N"_0/2`
`"N"_0/sqrt2`
`"N"_0/4`
`"N"_0/8`
उत्तर
`"N"_0/sqrt2`
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