A solid has a structure in which `W` atoms are located at the corners of a cubic lattice, `O` atom at the centre of edges, and `Na` atom at the centre of the cube. The formula for the compound is

Options

A. `NaWO_(2)`
B. `NaWO_(3)`
C. `Na_(2)WO_(3)`
D. `NaWO_(4)`

Answer

B

Explanation

In a unit cell,
W atoms at the corner `=(1)/(8)xx8=1`
O atoms at the centre of edges `=(1)/(4)xx12=3`
Na otoms at the centre of the cube = 1
`W:O:Na=1:3:1` . Hence formula is `NaWO_(3)` .