The edge length of the unit cell of tantalum metal, Ta, is 330.6 pm; the unit cell

Question:

The edge length of the unit cell of tantalum metal, Ta, is 330.6 pm; the unit cell is body centered cubic (one atom at each lattice point). Tantalum has a density of 16.69 g/cm3. What is the mass of a tantalum atom? Use Avogadro’s number to calculate the atomic mass of tantalum.