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$

Answer

Correct option: C.
$C{l^ - }$ and $Ar$
c
(c) No. of electron are same $(18)$  in $C{l^ - }$ and $Ar$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

$B{r_2} + NaOH\xrightarrow{{R.T.}}Y + Z$

If $Y$ gives precipitate with $AgNO_3 ,$ then $Z$ does not undergo reaction with

$20\, ml$ solution contains $0.1\, M, NH_4Cl$ and $0.01\, M\, NH_4OH$. By adding which one its $pH$ will not change ?
For $F_2$ and $OF$ molecules consider the following statements 
$(a)$ Bond order for both is one
$(b)$ $OF$ is paramagnetic but $F_2$ is diamagnetic
$(c)$ $F_2$ is more likely to dissociate into atoms than $OF$
$(d)$ Both have greater number of electrons in $BMO$ than that in $ABMO$
Which of the following statements are true $(T)$ or false $(F)$ respectively
Find the value of wave number of $(\bar v)$ in terms of Rydberg's constant, when transition of electron takes place between two levels of $He^+$ ion whose sum is $4$ and difference is $2$
Which of the following is most stable conformer of Butane ?
The valency of carbon is four. On what principle it can be explained in a better way
An ionic compound is generally a
For the Balmer series in the spectrum of $\mathrm{H}$ atom, $\quad \bar{v}=R_{H}\left\{\frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}}\right\}, \quad$ the correct statements among $(I)$ to $(IV)$ are

$(I)$ 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

What is the mass of the precipitate formed when $50\ mL$ of $16.9\%$ solution of $AgNO_3$ is mixed with $50\ mL$ of $5.8\%$ $NaCl$ solution $?$ ............. $\mathrm{g}$ $(Ag = 107.8, N = 14, O = 16, Na = 23,Cl = 35.5)$
The high melting point and insolubility in organic solvents of sulphanilic acid are due to its ...... structure.