The total number of neutrons in dipositive zinc ion with mass number 70 is
Z for Zn = 30
No.of neutrons = A – Z
= 70 – 30
The neutron separation energy is defined to be the energy required to remove a neutron from a nucleus. Obtain the neutron separation energy of the nucleus of . Given : mass of atom = 40.962278 u, mass of atom = 39.962591 u, mass of neutron = 1.008665 u and .
The nucleus decays by -emission. Write down the decay equation and determine the maximum kinetic energy of the emitted electron. The atomic masses of are 22.994466 u and 22.989770 u respectively.
When a deuteron of mass 2.0141 u and negligible kinetic energy is absorbed by a lithium nucleus of mass 6.0155 u, the compound nucleus disintegrates spontaneously into two alpha particles, each of mass 4.0026 u. Calculate the energy in joule carried by each alpha particle.
If the half lives of a radioactive element for α and β decay are 4 yrs and 12 yrs respectively, the ratio of their activities after six yrs will be
Half life of a radioactive sulistance A is 4 days. The probability that a nucleus will dacay in two half lives is
The half life of The time taken for the radioactivity of a sample of to dacay to 1/6 th of its initial value is:
The half life of 131I is 8 days. Give a sample of 131I at time t = o, we can assert that
The mass of one mole of electrons is
The increasing order for the values of e/m is
A radioactive nucleus is leing produed at a constant rate ∝ per second. Its decay constant is λ. If No. are the number of nuclei at time t = 0, then themanimum no, of nuclei