Select the correct statement(s): (a) The co-ordination number of each type of ion in a CsCl crys...

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Select the correct statement(s):
(a) The co-ordination number of each type of ion in a CsCl crystal is twelve
(b) A metal that crystallizes in a bcc structure has a co-ordination number of twelve
(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 \( \mathrm{NaCl} \) in \( 552 \mathrm{pm} \) (given that \( r_{\mathrm{Na}^{+}}=85 \mathrm{pm} \) and \( r_{\mathrm{Cl}^{-}}=181 \mathrm{pm} \) )
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