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Question
Which of the following are isotopes and which are isobars ?
Argon, Deuterium, Calcium, Tritium, Protium
Solution
Deuterium (`""_1^2"H"`) ,(`""_1^1"H"`) protium and (`""_1^3"H"`)tritium are isotopes of hydrogen. `""_18^40"Ar"` and `""_20^40"Ca"` (Argon and Calcium, respectively) are isobars with same mass number but different atomic numbers.
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