The atomic number of calcium and argon are 20 and 18 respectively, but the mass number of both these elements is 40. What is the name given to such a pair of elements?

Answers (1)

Answer:

Elements with the same mass number (A) but different atomic numbers (Z) are called isobars. Calcium and Argon are isobars. Hence _{20}^{40}\textrm{Ca} and is _{18}^{40}\textrm{Ar} are isobars

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