How many unpaired electrons are there in the ground-state electron configuration for an atom of each of the following elements? calcium lithium bromine aluminum
Ca : 0 (both of the valence electrons fill the 4s case) Li : 1 (only one valence electron in 2s case) Br : 1 (5 valence electrons in 4p case) Al : 1 (one valence electron in 3p case)
(1 ft x 12 in/ft x 2.54 cm/in)^2 929.0 cm^2 3.380 gm / 2.699 g/cm^3 1.252 cm^3 ? cm thick x 929.0 cm^2 1.252 cm^3 thickness 1.252 / 939.0 0.001348 cm 0.001348 cm 0.01348 mm 1.348 x 10^-2 mm
