Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is isotopes and isobars?

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Isotopes: The atoms which posses same atomic number (the atoms same element) but a different mass number are called Isotopes. (1 mark)
Ex: ₁H¹, ₁H², ₁H³
These are the isotopes of Hydrogen. (1 mark)
The difference in mass number is due to a different number of neutrons present in the nucleus.

Isobars: The atoms which posses different atomic number with a same mass number are called Isobars. (1 mark)
Ex : ₁₈Ar⁴⁰, ₂₀Ca⁴⁰ (1 mark)