CBSE Class 12-science Answered
Potassium crystallizes in a body centered cubic lattice.what is tge aporoximate no.of unit cells in 4.0g of pottasium?
Asked by sethupathy | 26 Aug, 2017, 06:58: PM
Expert Answer
Atomic mass of potassium is 39 g.
In a BCC unit cell, there are 8 atoms at the corner of a cube and 1 atom at the centre.
Number of atom per unit cell =
8 x 1/8 + 1 x 1 = 2
Number of atoms in 4.0 g of potassium = 4/39 x 6.02 x 1023
Number of unit cells in 4.0 g of potassium = 4/39 x 6.02 x 1023/2 = 3.09 x 1022 unit cells
Answered by Prachi Sawant | 26 Aug, 2017, 08:38: PM
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