Please hurry Add or subtract as indicated. Make sure that your answers contain the correct number of significant digits.
o. 0.00078 mm - 0.0075 mm
p. 4203 5 - 2.85 kg
q. 4.3x10-4 kg + 3.9x10-3 r. 4.90x103 m - 7.8x103

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?