Question #e5346

1 Answer
anor277
Sep 29, 2016

First you need #Z#, #"the atomic number"#.

Explanation:

And #"Mass number"-"Atomic number"# #=# #"Number of neutrons"#.

Both neutrons and nuclear protons are the massive particles of the atom, and both contribute to the mass of an isotope. You need both to make the determination of mass.

Related questions
See all questions in Mass Number
Impact of this question
1468 views around the world
You can reuse this answer
Creative Commons License