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Second nearest neighbours of na ion in nacl unit cell is A) 4 B) 6 C) 8 D) 12.?
Most Upvoted Answer
Second nearest neighbours of na ion in nacl unit cell is A) 4 B) 6 C)...
In second nearest neighbour...there are other Na+ ions sitting at edge centres. These would be 12 in number (12 edges surrounding a body centre)...

So, right answer is 12...

$$Hope it's help... $$
Community Answer
Second nearest neighbours of na ion in nacl unit cell is A) 4 B) 6 C)...
Explanation:

In NaCl unit cell, Na+ ion is surrounded by 6 Cl- ions which are its nearest neighbours. The second nearest neighbours are the 12 Cl- ions which are in contact with the 6 nearest neighbour Cl- ions. But since each of these 12 Cl- ions is also the nearest neighbour of some other Na+ ion, only half of them (i.e. 6) can be considered as the second nearest neighbours of the Na+ ion in question.


Answer:

Hence, the correct option is C) 8.
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Second nearest neighbours of na ion in nacl unit cell is A) 4 B) 6 C) 8 D) 12.?
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