The density of pure silver is 10.5g/mL. If 4287mg of pure silver pellets are added to a graduated cylinder containing 26.4mL of water, to what level will the water in the cylinder rise

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?