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abstraction > mathematical concept > number > integer

integer
subject			fact

integer	has value whole number
	is a kind of number

Kinds of integer :

• atomic mass number (3 facts) - 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.
• atomic number (7 facts) (charge number) - The number of protons in an atom's nucleus. This determines the type of element.