Chemistry
The atomic species X and Y have different number of protons but the same number of nucleons. While atoms A and B have the same number of protons but different number of nucleons.
(a) Which of them are
(i) isotopes
(ii) isobars ?
(b) Give one example of each.
Atomic Structure
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Answer
(a) (i) A and B are isotopes, as they have same atomic number but different mass number.
(ii) X and Y are isobars, as they have same mass number but different atomic number.
(b) (i) Examples of isotopes — 3517Cl, 3717Cl
(ii) Examples of isobars — 4018Ar, 4020Ca
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