During the nuclear explosion, one of the products is 90 S r with half life of 6.93 years. If 1 μ g of 90 S r was absorbed in the bones of a newly born baby in place of C a , how much time, in years, is required to reduce it by 90 % if it is not lost metabolically ____________.

Question

During the nuclear explosion, one of the products is 90 S r with half life of 6.93 years. If 1 &#956; g of 90 S r was absorbed in the bones of a newly born baby in place of C a , how much time, in years, is required to reduce it by 90 % if it is not lost metabolically ____________.

Aicharya · Accepted Answer

Radioactive disintegration is always a first order reaction for a first order reaction. Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation.

K t = 2.303 \log \frac{[A_{o}]}{[A_{t}]}

where

[A_{o}] =

initial concentration

[A_{t}] =

concentration at time ‘t’

t_{\frac{1}{2}} = \frac{0.693}{K}

K = \frac{0.693}{t_{\frac{1}{2}}} = \frac{0.693}{6.93} \Rightarrow 0.1 y e n t s^{- 1}

t_{90 %} = \frac{2.303}{0.1} \log \frac{[100]}{[10]}

t_{90 %} = 23.03

years.

During the nuclear explosion, one of the products is 90 S r with half life of 6.93 years. If 1 μ g of…

Solution

During the nuclear explosion, one of the products is 90 S r with half life of 6.93 years. If 1 &#956; g of…

Solution

During the nuclear explosion, one of the products is 90 S r with half life of 6.93 years. If 1 μ g of…