If P,Q,R and S are elements of the 3^{rd} per | vedclass

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(D) The elements of the $3^{rd}$ period of the $p-$block are $Al$,$Si$,$P$,$S$,and $Cl$. Given that one is a metal and the rest are non-metals,and the

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$P$

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(D) The elements of the $3^{rd}$ period of the $p-$block are $Al$,$Si$,$P$,$S$,and $Cl$. Given that one is a metal and the rest are non-metals,and the electronegativity order is $P Electronegativity values for these elements are: $Al (1.61) Thus,$P = Al$,$Q = Si$,$R = P$,and $S = S$. $A$ hypovalent compound is one where the central atom has fewer than $8$ electrons in its valence shell (electron-deficient). $AlCl_3$ is a well-known hypovalent compound because the $Al$ atom has only $6$ electrons in its valence shell. Therefore,the element $P$ $(Al)$ forms a hypovalent chloride.

If $P$,$Q$,$R$ and $S$ are elements of the $3^{rd}$ period of the $p-$block,among these one element is a metal and the rest are non-metals,and their order of electronegativity is given as: $P < Q < R < S$. The chloride compound of which element is hypovalent?

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