Question

briefly explain the difference between an isotope and two species that are isoelectronic provide an example for an isotope and isoelectronic species to argon-40

Answer 1

Step-by-step explanation:

Isotope are the species which have same atomic number (number of the protons) but number of neutrons different. which corresponds to different mass of isotopes.

For example,

`^6_(12)C, ^6_(13)C, ^6_(14)C` are the three isotopes of carbon.

Isoelectronic are the species which have the same number of electrons.

For example,

Ne is isoelectronic with
`Na^+`

Isotopes of
`^(18)_(40)Ar` are:

`^(18)_(36)Ar, ^(18)_(38)Ar`

The number of the electrons in
`^(18)_(40)Ar` = 18

Number of the electrons in
`K^+` = 18

Thus,
`K^+` is isoelectronic to Argon-40