A solid has a structure in which `W` atoms are located at the corrent of a lattice `O` atoms at the center of edges and `Na` atoms at the center 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) xx 8 = 1`
`O` atoms at the center of edge `= (1)/(4) xx 12 = 3`
Na atoms at the center of the cube `= 1`
`W : O : Na = 1 : 3: 1` , hence formula `= NaWO_(3)`