Home Chemistry Chemical Bonding and Molecular Structure Molecular Orbital Theory An atom of an element A has three electrons …
Chemistry Chemical Bonding and Molecular Structure Molecular Orbital Theory Single Correct MCQ
Published on: August 13, 2026

An atom of an element A has three electrons in its outermost shell and that of B has six electrons in the outermost shell. The formula of the compound between these two will be

A
B
C
D

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The correct answer is:
B

Valency of A is 3 while that of B is 2 so according to Criss Cross rule the formula of the compound between these two will be .

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