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the claim

The mass number of an atom is calculated by adding the number of protons and the number of neutrons in the nucleus.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
1 source for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

AS REPORTEDno primary record reached; this is what the reporting says

Is it true that the mass number of an atom is calculated by adding the number of protons and the number of neutrons in the nucleus?

Yes. The claim is supported by reference sources stating that the mass number is the total sum of protons and neutrons in an atomic nucleus.

Verdict: SUPPORTED · 1 source for, 0 against · Last checked

How claims like this are judged

Judged against reference works: claims of this kind are settled by reference works, not journal abstracts.

Evidence for · 1
Wikipedia: Mass number
Reference article covering this claim directly
Get citation
Wikipedia: Mass number. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Mass_number

also asked as
  • Is the mass number of an atom found by adding protons and neutrons together?
  • Does adding the protons and neutrons give you the mass number of an atom?
  • Is it true that an atom's mass number is the sum of its protons and neutrons?
  • Can you calculate an atom's mass number by adding protons and neutrons?
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