1.

The rate of disintegration was observed to be \[{{10}^{17}}\] disintegrations per sec when its half life period is 1445 years. The original number of particles are                   [Pb. PET 2001]

A.            \[8.9\times {{10}^{27}}\]
B.            \[6.6\times {{10}^{27}}\]
C.            \[1.4\times {{10}^{16}}\]
D.            \[1.2\times {{10}^{17}}\]
Answer» C.            \[1.4\times {{10}^{16}}\]


Discussion

No Comment Found

Related MCQs