Question

Identify the true statement(s) among the following

• A. On bombarding ${}_7{N}^{14}$ nuclei with an $\alpha -$ particle, the nuclei of the product formed after release of proton would be ${}_8{O}^{17}$
• B. All radioactive disintegrations follow first order kinetics
• C. A nuclide and it's decay product after $\alpha -$ emission are called isodiapheres
• D. Half life of radium is 1580 years. Its average life will be 1097.22 years

Answer 1

Answer: (A), (B), (C)

The correct options are
A On bombarding ${}_7{N}^{14}$ nuclei with an $\alpha -$ particle, the nuclei of the product formed after release of proton would be ${}_8{O}^{17}$
B All radioactive disintegrations follow first order kinetics
C A nuclide and it's decay product after $\alpha -$ emission are called isodiapheres

(a) On bombarding ${}_7{N}^{14}$ nuclei. With $\alpha -$ particle, the nuclei of the product formed after release of a proton would be ${}_8{O}^{17}$.
(b) All natural and artificial radioactive decay of unstable nuclei take place by first order kinetics.
(c) Isodiaphers: Nuclides having different number of atomic number and mass number but the difference between the number of neutrons and the number of protons is same, so after alpha particle emission nuclide and its decay products are isodiaphers.
(d) Average life $\left(T_{avg}\right)=\frac{1}{k}=\frac{t_{1/2}}{0.693}$
$=1.44\times \left(t_{\frac{1}{2}}\right)$
$=1.44\times 1580\approx 2275$ years