Which of the given pairs of atoms contain(s) the same number of neutrons?

I ${}_{48}{}^{114}\mathrm{Cd}$ and ${}_{50}{}^{119}\mathrm{Sn}$

II ${}_{27}{}^{59}\mathrm{Co}$ and ${}_{28}{}^{59}\mathrm{Ni}$

III ${}_{55}{}^{133}\mathrm{Cs}$ and ${}_{54}{}^{132}\mathrm{Xe}$

IV ${}_{29}{}^{63}\mathrm{Cu}$ and ${}_{29}{}^{65}\mathrm{Cu}$

Description of a few atoms is given in the table.

Identify a cation, an anion and a pair of isotopes from the given table:

Study the given mass spectrum of magnesium carefully.

The number of protons in ${}^{26}\mathrm{Mg}$, number of neutrons in ${}^{25}\mathrm{Mg}$, and the relative atomic mass of $\mathrm{Mg}$ are respectively

Electron distribution of two elements $P$ and $Q$ in their outermost shell is shown below.

Atomic numbers of $P$ and $Q$ are respectively