A small bottle contains powdered beryllium (Be) and gaseous Radon which is used as a source of α− particles. Neutrons are produced when α− particles of the radon react with beryllium. The yield of this reaction is (1/4000) i.e. only one α− particle out of 4000 induced the reaction. Find the amount of radon (Rn222) originally induced into the source, if it produces 1.2×106 neutrons per second after 7.6 days.[T1/2 of Rn=3.8 days]

A small bottle contains powdered beryllium (Be) and gaseous Radon whic

1.	A small bottle contains powdered beryllium (Be) and gaseous Radon which is used as a source of α− particles. Neutrons are produced when α− particles of the radon react with beryllium. The yield of this reaction is (1/4000) i.e. only one α− particle out of 4000 induced the reaction. Find the amount of radon (Rn222) originally induced into the source, if it produces 1.2×106 neutrons per second after 7.6 days.[T1/2 of Rn=3.8 days]
Answer» A small bottle contains powdered beryllium $(Be)$ and gaseous $Radon$ which is used as a source of $α -$ particles. Neutrons are produced when $α -$ particles of the radon react with beryllium. The yield of this reaction is $(1 / 4000)$ i.e. only one $α -$ particle out of $4000$ induced the reaction. Find the amount of radon $(R n^{222})$ originally induced into the source, if it produces $1.2 \times 10^{6}$ neutrons per second after $7.6 days$ . $[T_{1 / 2} of R n = 3.8 days]$