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atomic mass number

subject fact

atomic mass number has definition The total number of protons and neutrons in an atom's nucleus. For example, oxygen-16 has a mass number of sixteen, because it has eight protons and eight neutrons. has source: Croswell, K. 1995 The Alchemy of the Heavens, Anchor Books, 2001-09-27 09:33:29.0
is an instance of quantum quantity
is an instance of integer

integer has value whole number 2001-09-27 09:32:57.0

quantity has unit 2001-09-27 09:33:12.0

atomic mass number	has definition The total number of protons and neutrons in an atom's nucleus. For example, oxygen-16 has a mass number of sixteen, because it has eight protons and eight neutrons.
	is an instance of quantum quantity
	is an instance of integer
integer	has value whole number
quantity	has unit