Question

answer the brief what is meant by atomic mass number ​

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. ... The mass number is different for each different isotope of a chemical element.

Explanation:

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Answer 2

Atomic Mass Number:

• The sum of the total number of protons and number of neutrons in a nucleus that is present in the nucleus.
• The atomic mass number is equal to the sum of the number of protons and neutrons.
• The number of protons equals the number of electrons in an atomic number.
• It is denoted by the letter Z.
• The total number of protons and neutrons is equal to the mass number.
• It is denoted by the letter A.