Atomic Number Definition
noun
The number of protons in an atomic nucleus.
American Heritage
A number representing the relative position of an element in the periodic table, in which the elements are arranged in the order of their nuclear charges; a number representing the positive charge or the number of protons in the nucleus of the atom of an element: isotopes have the same atomic number but different mass numbers.
Webster's New World
Attributive form of atomic number.
Atomic-number data.
Wiktionary
Other Word Forms of Atomic Number
Noun
Singular:
atomic numberPlural:
atomic-numbers
Atomic Number Is Also Mentioned In
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