Multiple Choice
In atomic structure, how is the mass number of an atom calculated?
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4. Atoms and Elements
Isotopes
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In terms of subatomic particles, how does one isotope of an element differ from another isotope of the same element?
A
They have different numbers of electrons but the same number of protons.
B
They have different numbers of protons but the same number of neutrons.
C
They have different chemical symbols because they are different elements.
D
They have different numbers of neutrons but the same number of protons.
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