Nuclei

Related Questions

• Consider two nuclei of the same radioactive nuclide. One of the nuclei was created in a supernova explosion 5 billion years ago. The other was created in a nuclear reactor 5 minutes ago. The probability of decay during the next time is

  ---

• An artificial radioactive decay series begins with unstable $_{94}^{241}Pu$. The stable nuclide obtained after eight $\alpha -$ decays and five $\beta -$ decays is

  ---

• If the mass number of an atom is $A = 40$ and its electron configuration is $1{s^2},\;2{s^2},\;2{p^6},\;3{s^2},\;3{p^6}$, the number of neutrons and protons in its nucleus will be

  ---

• In the nuclear reaction: $X(n,\,\alpha ){\,_3}L{i^7}$ the term X will be 3

  ---

• N atoms of a radioactive element emit n alpha particles per second. The half life of the element is

  ---