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Calculate the density of potassium

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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.

Reference no: EM131949115

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