JEE Main Chemistry question
Not in JEE Main or NEET syllabus
In a face-centred cubic arrangement of and atoms, in which atoms are at the corners of the unit cell and atoms are at the face centres, one atom is missing from one corner of the unit cell. The simplest formula of the compound is written . The value of is .
Answer: 7
Solution
With one corner vacant, contributes per cell, while (all face centres intact) contributes .
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