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 ...

Oxygen, for example, has eight protons. However, the number of neutrons in an atom can vary, leading to different forms of ...

Explain with examples that isotopes have the same number of electrons and protons, it is the number of neutrons that changes.

Isotopes have the same number of protons but ... dietary and source information for a relatively shorter period. For example, blood plasma and liver turnover elements in a matter of days or ...

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 ...

Stable isotopes can be used by measuring their amounts and proportions in samples, for example in water samples. Naturally-occurring stable isotopes of water and other substances are used to trace the ...