The half - life of a radioisotope is four hours. If the initial mass of the isotope was 200 g, the mass remaining after 24 hours undecayed is

Question

The half - life of a radioisotope is four hours. If the initial mass of the isotope was 200 g, the mass remaining after 24 hours undecayed is (A) 1.042 g (B) 4.167 g (C) 3.125 g (D) 2.084 g

Tardigrade Admin · Accepted Answer

26 = (200/a-x) (a - x) = 3.125 gm

Q. The half - life of a radioisotope is four hours. If the initial mass of the isotope was 200 g, the mass remaining after 24 hours undecayed is

$1.042 g$

$4.167 g$

$3.125 g$

$2.084 g$

$2^{6} = \frac{200}{a - x}$
$(a - x) = 3.125 g m$

Q. The half - life of a radioisotope is four hours. If the initial mass of the isotope was 200 g, the mass remaining after 24 hours undecayed is

1.042g

4.167g

3.125g

2.084g

26=a−x200​ (a−x)=3.125gm

$1.042 g$

$4.167 g$

$3.125 g$

$2.084 g$

$2^{6} = \frac{200}{a - x}$
$(a - x) = 3.125 g m$