Question

A and B represents two elements. what will be the chemical formula for their compound based on their atomic structure
a)A2B3 b) AB3 c)AB2 d)AB​

Answer 1

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A atoms are at the corners of the cube. There are 8 corners and each contributes one eight to the unit cell. Total number of A atoms =$8×81=1.$

B atoms are at the face centres of the cube. There are 6 face centres and each contributes one half to the unit cell. Total number of B atoms =$6×21=3.$

The formula of the compound is $AB3$

Answer 2

AB3 is the correct answer