atomic mass number
(a-tom-ic-mass-num-ber)
6 syllables
Definition
noun. The total number of protons and neutrons in an atomic nucleus.
Example Sentence
The atomic mass number helps in identifying the isotopes of an element.
More Example Sentences
Scientists use the atomic mass number to calculate the average atomic mass of elements.
Synonyms
mass number; nucleon number; atomic weight
Antonyms
atomic number; electron number; charge number
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atomic mass number
