Which of the following are isotopes and which are isobars ?
Argon, Deuterium, Calcium, Tritium, Protium.

Explanation

The symbol notations for elements are represented as follows:
`overset(40)underset(18)Ar,overset(1)underset(1)H,overset(40)underset(20)Ca,overset(2)underset(1)H`
`overset(1)underset(1)H` and `overset(2)underset(1)H` ar isotopes while `overset(40)underset(18)Ar` and `overset(40)underset(20)Ca`n ar isobars . Since the isotpes of an element have same atomic numbr they have same electronic configuration and also similar chemical properties .They have different physicla properties since their mass numbrs are different