atomic mass number (A-number) — An Etymological Dictionary of Astronomy and Astrophysics

atomic mass number (A-number)

عدد ِ جرم ِ اتمی

adad-e jerm-e atomi (#)

Fr.: nombre de masse atomique

The total number of → protons and → neutrons in the → nucleus of an → atom (symbol A). For example, Oxygen-16 has a mass number of sixteen, because it has eight protons and eight neutrons.

See also: → atomic; → mass; → number.

An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک