Is it safe to take 450mg of diphenhydramine hydrochloride?

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?

Can anyone answer these questions? ? i need it before 1: 00pm today

Which subatance is not soluble in water