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which of the following statemets is ...

which of the following statemets is not true about the hexagonal close packing ?

A

In hcp , atoms occupy 74% the available space

B

It is AB AB type packing in which third layer is aligned with the first layer

C

Be, Mg, Mo etc. are found to have hcp structure

D

The coordination number is 6

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The correct Answer is:
D
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Which of the following statemets is correct ?

Which of the following statements is/are correct about hexagonal close packing ? 1. The coordination number is 8 2. It is ABAB type packing in which third layer is aligned with the first layer 3. Be, Mg, Mo etc. are found to have hcp structure 4. In hcp, atoms occupy 74% of the available space

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Which of the following are not true about hexagonal close packing ?

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