Question: how many electrons are contained in the 2p subshell of sulfur (s)?
Answer: Each group located in the p block designates an electron that can occupy the p subshell. Since the p block covers groups 13 through 18 , you can say that the p subshell can hold a maximum of 6 electrons. For sulfur, you can have l=1 for the second and third energy levels, i.e. periods in the Periodic Table.