mass number

mass num·ber

M m

Transcription

- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
- [mas nuhm-ber]
- /mæs ˈnʌm bər/
- /mæs ˈnʌmbə(r)/

- US Pronunciation
- US IPA
- [mas nuhm-ber]
- /mæs ˈnʌm bər/

Definitions of mass number words

noun mass number the integer nearest in value to the atomic weight of an atom and equal to the number of nucleons in the nucleus of the atom. Symbol: A. 1
noun mass number quantity of protons, neutrons in an atom 1
noun mass number the total number of neutrons and protons in the nucleus of a particular atom 0
noun mass number the number of neutrons and protons in the nucleus of an atom: the approximate mass of a given nucleus is obtained by multiplying the mass number by the fundamental unit of mass, 1.6605 × 10-24 grams (1⁄12 the mass of C12 atom) 0
noun mass number (physics) The total number of protons and neutrons in an atomic nucleus. 0

See all 5 definitions of mass number

Information block about the term

Origin of mass number

First appearance:

before 1920

One of the 12% newest English words

First recorded in 1920-25

Historical Comparancy

Parts of speech for Mass number

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

Full grammatical hierarchy of Mass number

mass number popularity

This term is known only to a narrow circle of people with rare knowledge. Only 29% of English native speakers know the meaning of this word.

According to our data about 69% of words is more used. This is a rare but used term. It occurs in the pages of specialized literature and in the speech of educated people.

mass number usage trend in Literature

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Synonyms for mass number

noun mass number

atomic mass — the mass of an isotope of an element in atomic mass units
atomic number — the number of protons in the nucleus of an atom of an element
atomic volume — the atomic weight (relative atomic mass) of an element divided by its density
atomic weight — the weight of one atom of an element expressed in atomic mass units: it is the average weight of all the isotopes of the element

All 5 Synonyms of mass number