A two-dimensional solid pattern formed by two different atoms X and Y is shown below. The black and white squares represent atoms X and Y, respectively. The simplest formula for the compound based on the unit cell from the pattern is

Options

A. `XY_(8)`
B. `X_(4)Y_(9)`
C. `XY_(2)`
D. `XY_(4)`

Answer

A

Explanation

The unit cell of the above pattern will consist of 8 white square and 1 black square i.e., it will form centre unit cell.
`:.` No. of white squrare `Y=8`
No. of black square X=1
`:.` Formula `XY_(8)`