NEET UG CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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Atoms

\mathrm{X}

and

\mathrm{Y}

combine to create an ionic compound with the formula

\mathrm{XY}_2.

Among the following options, which pair of atomic numbers for

\mathrm{X}

and

\mathrm{Y}

is suitable for this compound?

View answer and explanation

Correct option: C

\mathrm{X}=12 ; \mathrm{Y}=17

Option C (

\mathrm{X}=12 ; \mathrm{Y}=17

) is correct because X with 12 electrons (Magnesium) will lose 2 electrons to form

X^{2+}

, and Y with 17 electrons (Chlorine) will gain 1 electron to form

Y^{-}

. Thus, the formula

XY_2

is formed.

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