Question

define isobar with example

Answer 1

isobar are atom of different chemical elements that have the same no. of nucelons
correspondingly isobars differ in atomic no. but have the same mass no. an example of series of isobars would be 40S,40Cl,40K,40Ar and 40Ca.

Answer 2

Isobars are atoms (nuclides) of different chemical elements that have the same number of nucleons. Correspondingly, isobars differ in atomic number (or number of protons) but have the same mass number. Anexample of a series of isobars would be 40S, 40Cl, 40Ar, 40K, and 40Ca.