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(A) The given electronic configuration is $1s^2 2s^2 2p^6 3s^2 3p^3$,which corresponds to Phosphorus $(P)$ with atomic number $Z = 15$.This element be

Vedclass · Accepted Answer

$33$

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(A) The given electronic configuration is $1s^2 2s^2 2p^6 3s^2 3p^3$,which corresponds to Phosphorus $(P)$ with atomic number $Z = 15$.This element belongs to Group $15$ (Nitrogen family).To find the element immediately below it in the same group,we add the magic number $18$ to the atomic number of the element in the $3^{rd}$ period.Atomic number of the element below = $15 + 18 = 33$ (Arsenic,$As$).

The electronic configuration of an element is $1s^2 2s^2 2p^6 3s^2 3p^3$. What is the atomic number of the element that lies immediately below this element in the periodic table?

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