The mass number (symbol A, from the German word: Atomgewicht, "atomic weight"), [1] also called atomic mass number or nucleon number, is the total number of protons and neutrons …

mass number, in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom.

Apr 16, 2018 · Mass number is an integer (whole number) equal to the sum of the number of protons and neutrons of an atomic nucleus. In other words, it is the sum of the number of …

Jan 12, 2021 · Atomic number is the number of protons (Z) in an atom, while mass number is the number of protons and neutrons (A) in an atom. Mass number, atomic mass, and atomic …

Dec 24, 2025 · : a whole number that expresses the approximate mass of an atom in terms of the number of protons and neutrons in the atom

The mass number is defined as the total number of protons and neutrons in an atom. It can be calculated by adding the number of neutrons and the number of protons (atomic number) …

Sep 19, 2024 · The sum of the number of protons and neutrons present in its nucleus is called mass number of an atom of an element. Protons and neutrons are collectively called nucleons.

The total number of protons and neutrons in the nucleus of an atom. For example, nitrogen has 7 protons and 7 neutrons in its nucleus, giving it a mass number of 14.

The mass number, also known as the nucleon number, is the total number of protons and neutrons in the nucleus of an atom. It is a fundamental property that helps identify the specific …

Feb 15, 2025 · What Is Mass Number Mass number is the total count of protons and neutrons in an atom's nucleus.