Two elements P & Q are forming ionic compound having the formula " $____$ " when the electronic configuration of $P & Q$ are as follows-
P: [Ne] 3s²3p⁴ & Q: [Ar] 4s¹
and As cations are written first in the formula, the formula is:

Question

Two elements P & Q are forming ionic compound having the formula " $____$ " when the electronic configuration of $P & Q$ are as follows-

P: [Ne] 3s²3p⁴ & Q: [Ar] 4s¹

and As cations are written first in the formula, the formula is:

TestHub · Accepted Answer

To determine the ionic compound formula, first find the valency of P and Q.

P: [Ne] 3s²3p⁴. It has 6 valence electrons, so it gains 2 electrons to form P²⁻.

Q: [Ar] 4s¹. It has 1 valence electron, so it loses 1 electron to form Q⁺.

To balance charges, two Q⁺ ions are needed for one P²⁻ ion. The formula is Q₂P.

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