Nuclei Quiz 1

The nuclei having the same number of protons but different number of neutrons are called

The nuclear volume of $\frac{8}{4}$ Be is ………. that of $\frac{1}{1}$ H.

When a $\beta -particle$ is emitted by a nucleus, its mass number

When an $\alpha-particle$ is emitted by a nucleus, its mass number

When a $\gamma-ray$ photon is emitted by an unstable nucleus,

In a radioactive transformation, a change in the mass number occurs with

The half-life of radium is 1600 y. How much of 1 μg of radium will remain undistintegrated after 8000 y?

In one mean lifetime of a radioactive element, the fraction of the nuclei that has disintegrated is [e is the base of natral logarithm.]

The decay constant of a radioactive element is $\lambda$ After a time $2 \lambda ^{-1}$ of the original number of radioactive nuclei about ……………….. remains undecayed.

The energy generated in the stars is because of