MCQ
Which of the following outer electronic configuration represents argon
- A$n{s^2}$
- ✓$n{s^2}n{p^6}$
- C$n{s^2}n{p^5}$
- D$n{s^2}n{p^4}$
Atomic no. of argon is $18$. Its electronic configuration will be $1 s^2 2 s^2 2 p^6 3 s^2 3 p^6$.
As the outermost shell is full $\left(3 s ^2 3 p ^6\right)$ it is called noble gas.
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$\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,C{H_3}}\\
|\\
{C{H_3} - C - OH}\\
|\\
{\,\,\,\,\,\,\,C{H_3}}
\end{array}}\limits_{\rm{I}} $ $\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,C{H_3}}\\
|\\
{C{H_3} - CH - OH}
\end{array}}\limits_{{\rm{II}}} $ $\mathop {C{H_3} - C{H_2} - OH}\limits_{{\rm{III}}} $ $\mathop {\begin{array}{*{20}{c}}
{\,\,\,Ph}\\
|\\
{C{H_3} - C - OH}\\
|\\
{\,\,\,\,\,\,\,{\kern 1pt} C{H_3}}
\end{array}}\limits_{{\rm{IV}}} $