Question

The sum of the number of protons and neutrons of an atom is a) nucleus b) atomic Number c) Mass Number d) relative atomic Mass​

Answer 1

Answer:

The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus

Answer 2

Answer:

atomic number

Explanation:

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