Alpha, Beta and Gamma Rays

Arrange in descending order, on the basis of their penetration power.
Alpha rays, Beta rays, Gamma rays, Cosmic rays.

${}_{88}{}^{}R{a}^{226}$ experiences three $\alpha$ - decay. Find the number of neutrons in the daughter element.

In the nuclear reaction ${}_6{X}^{12}{\stackrel{\alpha }{\to }}_{}{\stackrel{}{\text{decay}}}_Z{Y}^A$, the value of $A$ & $Z$.

Which of the following statements is/are correct?
i. $\alpha$ particles are photons
ii. Penetrating power of $\gamma$ radiation is very low
iii. Ionization power is maximum for $\alpha$ rays
iv. Penetrating power of $\gamma$ radiation is very high

_____ aprons are used to protect us from gamma radiations.

Gamma radiations are dangerous because

In which of the following, no change in mass number of the daughter nuclei takes place?
(i) $\alpha$ decay       (ii) $\beta$ decay         (iii) $\gamma$ decay        (iv) Neutron decay

Mass number of a radioactive element is $232$ and its atomic number is $90$. When this element undergoes certain nuclear reactions, it transforms into an isotope of lead with a mass number $208$ and an atomic number $82$. Determine the number of alpha and beta decay that can occur.

Compare the properties of alpha, beta and gamma radiations.

State Soddy and Fajan’s displacement law.

If $\mathrm{A}$ is a radioactive element which emits an $\alpha$-particle and produces ${}_{104}{}^{259}\mathrm{Rf}$. Write the atomic number and mass number of the element $\mathrm{A}$.