Solid StateMedium
Question
Which of the following statement (s) is are correct ?
Options
A.The coordination number of each type of ion in CsCl crystal is 8
B.A metal that crystallizes in bcc structure has a coordination number of 12.
C.A unit cell of an ionic crystal shares some of its ions with other unit cells.
D.The length of the unit cell in NaCl is 552 pm. (rNa+ = 95 pm ; rCl- = 181 pm)
Solution
length of unit cell in NaCl is
⇒ (2rNa+ + 2rCl-) = 2 (rNa+ + rCl-) = 2[95 + 181]
⇒ a = 2 [rNa+ + rCl-] = 552 pm.
⇒ a = 2 [rNa+ + rCl-] = 552 pm.
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