What is the term used to describe the number of protons plus the number of neutrons in an atom?

What is the term used to describe the number of protons plus the number of neutrons in an atom?

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  1. The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons.

    Explanation:

  2. The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons.

  3. The number of protons plus the number of neutrons equals the atomic mass.

    Explanation:

    Atomic mass is defined as total number of protons and neutrons in the atom.

    It is an average mass of an atom.

    It is expressed in atomic mass unit that is a.m.u.

    It is denoted with symbol 'A'.

     [tex]A =\text{number of protons + number of neutrons}[/tex].

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