How many electrons in an atom can have the quantum

The question is: How many electrons in an atom can have the quantum numbers n = 4 and l = 1?The other question was: When solid sodium chloride (NaCl) is dissolved in liquid water the sodium ion is attracted to the water molecule’s:A.) negative end which is hydrogenB.) negative end which is oxygenC.) positive end which is hydrogenD.) positive end which is oxygen