Keyword Analysis & Research: the mass number of an atom definition

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What particles determine mass number?

The total number of protons and neutrons in an atomic nucleus determines mass number. It is also called atomic mass number or nucleon number. The mass number is written either after the element name or as a superscript to the left of an element's symbol.

What is the mass number?

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. It is approximately equal to the atomic...

What is an example of atomic number?

Atomic Number Examples. The atomic number of hydrogen is 1; the atomic number of carbon is 6, and the atomic number of silver is 47, Any atom with 47 protons is an atom of silver.


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