Shaalaa.com | packing in solids
An element crystallises in bcc lattic with a cell edge of 3 × 10-8cm. The density of the element is 6.89 g cm-3 . calculate the molar mass of element. (NA = 6.022 × 1023 mol-1)
Niobium crystallises in body-centred cubic structure. If density is 8.55 g cm−3, calculate atomic radius of niobium using its atomic mass 93 u.