but on the other hand no preferred direction is usually a sign of chemical inertness, so they wud rather be gaseous. Thank you!

Question: Molybdenum has a BCC crystal structure, an atomic radius of 0.1363 nm, and an atomic weight of 95.94 g/mol. Question: Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and an atomic weight of 55.85 g/mol. At first I was fairly confused why you were using $10^{-10}$ instead of $10^{-12}$, until I realised it was meant to be in centimetres. In atomic systems, by convention, the APF is determined by assuming that atoms are rigid spheres.

Theoretical Density, ... BCC, HCP). FCC or BCC isnt just determined by the radius or density. It is a dimensionless quantity and always less than unity. Theoretical Density Example: Copper ρ=n A VcNA # atoms/unit cell Atomic weight (g/mol) By way of comparison, Wikipedia cites a density of $\pu{2.013 g cm-3}$.
it is also determined by the direction of bonds that particular element prefers. if there is no preferred direction, all elements wud settle into either FCC or HCP (or a ramdom close packing). CHAPTER 3: CRYSTAL STRUCTURES & PROPERTIES • tend to be densely packed. Please show all work!!! Many other features depend upon the crystal structure of metals, such as density, deformation processes, alloying behavior, and much more. Compute its theoretical density. In crystallography, atomic packing factor (APF), packing efficiency or packing fraction is the fraction of volume in a crystal structure that is occupied by constituent particles. Question: Chromium has a BCC crystal structure, an atomic radius of 0.125 nm, and an atomic weight of 52.00 g/mol. FCC. By the way, regarding your final equation, it's a good idea to leave the units in.

Thus, it … Calculate the theoretical density of HCP titanium given that titanium has an atomic radius of 0.147 nm and an atomic weight of 47.867. • Material properties generally vary with single crystal orientation (i.e., they are anisotropic), but properties are generally non-directional

Assume the c/a ratio is 1.633.