Question

what is meant by isobars and isotopes?

Answer 1

Ans:  Isotopes: The atoms which posses same atomic number (the atoms same element) but different mass number are called Isotopes. Ex: ₁H¹,₁H², ₁H³  These are the isotopes of Hydrogen. The difference in mass number is due to different number of neutrons present in the nucleus. Isobars: The atoms which posses different atomic number with same mass number are called Isobars. Ex : ₁₈Ar⁴⁰,₂₀Ca⁴⁰

Answer 2

element which have same molecular formula but different structural formula are called isomers.

isobars are those elements which have same atomic mass but different atomic number.
ex.40Cl 40Ca
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