When does the nucleus of an atom tend to be radioactive ?

The nucleus of an atom contains

When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom.

The nucleus of an atom is considered to be electrically

The average distance of electron from the nucleus in an atom is of the order of

Initially two radioactive nucleus have same no of active nucleus their half life are 3 years and 4 years respectively after how many years, number of nucleus of one of the radioactive element is half the number of active nucleus of other radioactive element.

Estimate the number of mean lives elapsed, when the number of atoms in a radioactive sample decrease to 5% of the original value.

The decay constant of a radioactive element is defined as the reciprocal of the time interval after which the number of atoms of the radioactive element falls to neraly

With what velocity should an alpha - particle travel toward the nucleus of a copper atom at a distance of 10^(-13)m from the nucleus of the copper atom ?

With what velocity should an alpha - particle travel towards the nucleus of a copper atom at a distance of 10^(-13)m from the nucleus of the copper atom?