24. Give one example of isobars.
Isobars are the atoms of different elements having same mass number but different atomic numbers.
For example- Ar1840andCa2040
Argon (Ar)
Mass number- 40
Atomic number- 18
Calcium (Ca)
Atomic number- 20
Explain with examples (i) Atomic number, (ii) Mass number, (iii) Isotopes and (iv) Isobars. Give any two uses of isotopes.