and the sum of the protons and neutrons gives the atomic mass, the number of neutrons defines the isotope of that element. For example, most carbon (≈ 99 %) has 6 protons and 6 neutrons and is written ...

7}^{14}\textrm{N}\) and \(_{6}^{14}\textrm{C}\) are not isotopes. They have the same mass number, A, but different atomic number, Z, and different chemical symbol - they are not the same element.

The term ‘weighted mean mass’ takes into account the different contribution of each isotope to the overall mass. Relative atomic mass is not the same as mass number. Mass numbers close mass ...

Isotopes have the same number of protons but differ in their number ... the relative abundance of stable isotopes results from tiny mass differences that cause the isotopes to act differently ...

Atomic nuclei with “magic numbers” of protons or neutrons in their nuclear shells are extremely stable. Nuclear physicists are especially interested in nuclei with doubly magic numbers—those that have ...

When the number of neutrons ... energies of the lanthanum isotopes. The bump that was observed is distinct and warrants more research. After I did the mass data analysis and calculated the two ...