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

N a_{2} W O_{3}

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N a_{2} W O_{2}

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N a W O_{2}

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N a W O_{3}

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Solution

The correct option is D $N a W O_{3}$
Number of 'W' atoms $=$ 8 x 1/8 $=$ 1 (since these are at the corners)
Number of 'O' atoms $=$ 12 x 1/4 $=$ 3 (because 'O' atoms are at the centers of face edges)
Number of 'Na' atoms $=$ 1 x 1 $=$ 1 (The Na atom is at the center of the cube).
The formula of the compound is $N a W O_{3}$ .

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[KCET 1996]

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

The correct option is D NaWO3Number of 'W' atoms = 8 x 1/8 = 1 (since these are at the corners)Number of 'O' atoms = 12 x 1/4 = 3 (because 'O' atoms are at the centers of face edges)Number of 'Na' atoms = 1 x 1 = 1 (The Na atom is at the center of the cube).The formula of the compound is NaWO3.