Respuesta :
Answer: Option (F) is the correct answer.
Explanation:
Species which contain same number of protons but different number of neutrons are known as isotope.
For example, [tex]^{1}_{1}H[/tex] and [tex]^{3}_{1}H[/tex] are isotopes.
These are isotopes of hydrogen and hence, each of them contain 1 proton but the number of neutrons are different.
Whereas the rest of the given species are not isotopes as they contain different number of protons.
When two species contain same atomic mass then they are known as isobars.
For example, [tex]^{40}K[/tex] and [tex]^{40}Ca[/tex] are isobars.
When two different species contain same number of electrons then they are known as isoelectronic species.
For example, both [tex]16O^{2-}[/tex] and [tex]19F^{-}[/tex] contain 10 electrons each. Hence, they are isoelectronic.
Thus, we can conclude that [tex]^{1}_{1}H[/tex] and [tex]^{3}_{1}H[/tex] represents a pair of isotopes.
