What are isobars ?

Options

A. Elements with same atomic number but different mass number
B. Elements with different atomic number but same mass number
C. Elements with different atomic number and different mass number
D. Elements with same atomic number and same mass number

Answer

B

Explanation

Isobars are atoms of dif= ferent chemical elements that have the same number of nucleons. Correspondingly, isobars differ in atomic number (number of protons) but have the same mass number. An example of a series of isobars `is^(40)S, “”^(40)Cl, “”^(40)Ar, “”^(40)K, and “”^(40)CCa.` The nuclei of these nuclides all contain 40 nucleons, however, they contain varying numbers of protons and neutrons.