SELECT * FROM question_mgmt as q WHERE id=1760 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=56 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th chemistry The Solid State explain how much portion of an atom located at

Question:

Explain how much portion of an atom located at

(i) corner and

(ii) body-centre

of a cubic unit cell is part of its neighbouring unit cell.

Answer:

(i) An atom located at the corner of a cubic unit cell is shared by eight adjacent unit cells.

Therefore, 1/8 portion of the atom is shared by one unit cell.

(ii) An atom located at the body centre of a cubic unit cell is not shared by its neighbouring unit cell. Therefore, the atom belongs only to the unit cell in which it is present i.e., its contribution to the unit cell is 1.


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