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mass number

Sum of the number of neutrons (n) and the number of protons (p) in the nucleus of an atom. It gives the approximate mass of that atom. Compare atomic number.

Subject: 
Environmental Science [1]
Vocabulary: 
Chapter 3 - Science, Systems, Matter & Energy [2]
Source URL:https://course-notes.org/glossary/term/mass_number_0#comment-0

Links
[1] https://course-notes.org/subject/environmental_science [2] https://course-notes.org/vocabulary/chapter_3_science