$(i)$ Atomic radius $(ii)$ Ionisation energy $(iii)$ Nuclear charge
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$\mathrm{E}_{\mathrm{n}}=$ Total energy, $\mathrm{K}_{\mathrm{n}}=$ Kinetic energy, $\mathrm{V}_{\mathrm{n}}=$ Potential energy , $\mathrm{r}_{\mathrm{n}}=$ Radius of $\mathrm{n}^{\text {th }}$ orbit
Match the following:
| Column $I$ | Column $II$ |
| $(A)$ $\mathrm{V}_{\mathrm{n}} / \mathrm{K}_{\mathrm{n}}=$ ? | $(P)$ $0$ |
| $(B)$ If radius of $n^{\text {th }}$ orbit $\propto E_n^x, x=$ ? | $(Q)$ $-1$ |
| $(C)$ Angular momentum in lowest orbital | $(R)$ $-2$ |
| $(D)$ $\frac{1}{\mathrm{r}^{\mathrm{n}}} \propto \mathrm{Z}^{\mathrm{y}}, \mathrm{y}=$ ? | $(S)$ $1$ |
