MCQ
Which one pair of atoms or ions will have same configuration
- A${F^ + }$ and $Ne$
- B$L{i^ + }$ and $H{e^ - }$
- ✓$C{l^ - }$ and $Ar$
- D$Na$ and $ K$
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If $Y$ gives precipitate with $AgNO_3 ,$ then $Z$ does not undergo reaction with
$(I)$ As wavelength decreases, the lines in the series converge
$(II)$ The integer $n_{1}$ is equal to $2$
$(III)$ The lines of longest wavelength corresponds to $\mathrm{n}_{2}=3$
$(IV)$ The ionization energy of hydrogen can be calculated from wave number of these lines