Question

The total number of protons and neutrons present in one atom of an element is known as _​

Answer 1

Answer:

The mass number (A) of an atom is the total number of protons and neutrons in its nucleus. The mass of the atom is a unit called the atomic mass unit (amu). One atomic mass unit is the mass of a proton, or about 1.67×10−27 kilograms, which is an extremely small mass.

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Answer 2

Answer:

The total number of protons and neutrons in an atom is called its ↯↯↯↯↯↯↯

mass number

Explanation:

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