10. A neutral electroscope was charged to acquire a net charge of – 4.80 x 10^-15 C. a. Explain if the electroscope gained or lost electrons.
b. How many electrons were transferred to charge the electroscope?

Ahypothetical metal has an orthorhombic unit cell for which the a, b, and c lattice parameters are 0.413 nm, 0.665 nm, and 0.876 nm, respectively. (a) if there are 8 atoms per unit cell and the atomic packing factor is 0.536, determine the atomic radius (in nm). (b) if the density is 3.99 g/cm3, calculate the metal's atomic weight (in g/mol).