The element technetium (Tc) crystallizes with a Simple Hexagonal unit cell. The density of a technetium is 11.5 g/cm3. Use this information to calculate the metallic radius of technetium in picometers (pm). 1 pm = 1×10−12 meters. You may assume that the dimension c=1.633·a
Many elements crystalize with a unit cell that is hexagonally shaped (6 sided). The calculations of the unit cell dimension are not significantly more complicated than those for cubic unit cells. A hexagonal unit cell is shown below.
The cell dimension "a" is twice the radius (r) of the atom. 2r=a. For most elements the dimension "c" is approximately 1.633×"a".
The element technetium (Tc) crystallizes with a Simple Hexagonal unit cell. The density of a technetium is 11.5 g/cm3. Use this information to calculate the metallic radius of technetium in picometers (pm). 1 pm = 1×10−12 meters. You may assume that the dimension c=1.633·a
[Note: The theoretical value for the radius may be different from the experimentally determined value. Simply Googling the radius may not yield the correct result]
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