1. Potassium crystallizes with a body-centered unit cell. The radius of a potassium atom is 227 pm.
Calculate the density of potassium. Express your answer in terms of grams per cubic centimeter. length= 524pm
2. Nickel, Ni, has a face-centered cubic structure with an edge length of 352 pm. What is the density of this metal? Use the periodic table as needed.
The unit cell of a crystal can be described in term of its edge length, l, and the number of atoms it contains. The edge length defines the volume of a cubic unit cell, V, asV=l3
Simple cubic= 1 Atom per unit cell and edge length 2r, Body Centered Cubic= 2 atoms per unit cell and edge length 4r/square root of 3, Face Centered Cubic= 4 atoms per unit cell, and 2square root of 2 r is outside of square root.
3. Chromium crystallizes with a body-centered cubic unit cell. The radius of a chromium atom is 125 pm. Calculate the density of solid crystalline chromium in grams per cubic centimeter.Express your answer with the appropriate units.