Chapter 12, Problem 29a
Determine the number of atoms per unit cell for each metal.
(a) Polonium
Video transcript
Plonium crystallizes with a simple cubic structure. It has a density of 9.3 g/cm3, a radius of 167 pm, and a molar mass of 209 g/mol. Use these data to calculate Avogadro's number (the number of atoms in one mole).
An X-ray beam with l = 154 pm incident on the surface of a crystal produced a maximum reflection at an angle of u = 28.3°. Assuming n = 1, calculate the separation between layers of atoms in the crystal.
Determine the number of atoms per unit cell for each metal.
(b) Tungsten
Determine the number of atoms per unit cell for each metal.
(c) Nickel
Platinum crystallizes with the face-centered cubic unit cell. The radius of a platinum atom is 139 pm. Calculate the edge length of the unit cell and the density of platinum in g/cm3 .