The atomic number of calcium and argon are 20 and 18 respectively but the mass number of both these ...

Question

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

Accepted Answer

Elements with different atomic numbers but the same mass numbers are known as isobars Calcium and argon are isobars

NCERT Exemplar Solutions Class 9 Science Solutions for Structure of the Atom - Exercise in Chapter 4 - Structure of the Atom