1. The coordination number of a metal atom in a close-packed structure is? 2. Th

Question

1. The coordination number of a metal atom in a close-packed structure is?

2. The coordination number of a metal atom in a BCC structure is?

3. The coordination number of an atom in the diamond or zinc blende structure is?

4. Metallic hydrogen is a proposed high pressure state of hydrogen with exciting electrical properties. Calculations have been used to propose that this material will have a low coordination number. Of the three cubic structures we have discussed, body centered cubic is the most reasonable.

True or False?

Explanation / Answer

Cordination number in FCC or CCP or BCC is 12

1. Answer : 12

2. Answer : 12

3. Diamond or zinc blende forms BCC. Hence cordiation number is 12

4.

packing effeciency of BCC is maximum and hence density in this case will be high

so, answer is True

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