What two substance are found in the greatest abundance among the major salts dissolved in sea water?

potassium and iron
nitrogen and chlorine
sodium and chlorine
magnesium and potassium

Gunpowder residue is most likely to show up where on a shooters hands

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .