Answered

Which quantity can vary among atoms of the same element?
A) mass number
B) atomic number
C) number of protons
D) number of electrons

Verified Answer :

there is this thing called isotopes
it means that atoms of the same element can have a different number of neutrons.
if there is a change in the no. of neutrons, there will definitely be a change in the mass number.

so the answer is A) mass number

Answer: The answer is A) mass number

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