How many moles of chlorine are in 100g of chlorine

Which element would mostly likely have an electron affinity measuring closest to zero

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?

Which of the following is a physical property flammability heat of combustion solubility and toxicity