Radioactivity

Why do we use radiocarbon dating?

List the uses of radioisotopes.

Define count rate in Geiger Muller tube?

Geiger Muller tube is used to detect and measure the radiation.

Write a short note on application of radioactivity in the field of archaeology.

What is meant by radioisotopes?

Explain carbon dating.

The _____number remains the same, during the emission of a beta particle.

What is a daughter nuclei?

Define a parent nucleus.

What are the applications of radioactivity

Concept of neutrino was given by,

The effect of today's radioactive fallout will probably be more harmful to children of future generation than to present day children because

Find the incorrect statement about radioactive wastes.

A radioactive isotope has half-life of $5$ years. After how much time is its activity reduced to $3.125\%$ of its original activity? (Answer in years)

$1$ $\mathrm{curie}$ represents

Statement $\mathrm{I}$- A nucleus having energy $E_1$ decays ${\beta }^{-}$ emission to daughter nucleus having energy $E_2$, but the ${\beta }^{-}$ rays are emitted with a continuous energy spectrum having endpoint energy $E_1-E_2$.

Statement $\mathrm{II}$- To conserve energy and momentum in $\beta$-decay at least three particles must take part in the transformation.

A radioactive nucleus undergoes decay as follows:

$\mathrm{X}\stackrel{\mathrm{\alpha }}{⟶}{\mathrm{X}}_1\stackrel{{\beta }^{-}}{⟶}{\mathrm{X}}_2\stackrel{\mathrm{\alpha }}{⟶}{\mathrm{X}}_3\stackrel{\mathrm{\gamma }}{\to }{\mathrm{X}}_4$

If the mass number of $\mathrm{X}$ is $180$ and atomic number is $72$ calculate the mass number and atomic number of ${\mathrm{X}}_4$.

${\mathrm{Ne}}^{23}$ after energy absorption decays into two $\mathrm{\alpha }$ particles and an unknown nucleus. The unknown nucleus is

Origin of ${\mathrm{\beta }}^{-}$ electrons emitted during decay is