Why isotops have different mass numbers and why isobars have different atomic masses?

Asked by  | 7th Dec, 2013, 02:25: PM

Expert Answer:

An isotope is an atom that has different numbers of neutrons compared to its protons. So each variation of neutron numbers will give it a different mass number, but will still retain its atomic number.

Mass number = No. of protons + No. of neutrons

Isobars are atoms of different chemical elements that have the same number of nucleons (protons + neutrons). i.e, they have the same mass number. But, isobars differ in atomic number (or number of protons.

Answered by Hanisha Vyas | 9th Dec, 2013, 11:00: AM

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