Give the name or chemical symbol of:
the element in Group 5 (Group 15) and Period 3.
the halogen in Period 2 that exists as a diatomic gas at room temperature.
the alkaline earth metal (Group 2) that has the lowest atomic number.
the element in Group 4 (Group 14) and Period 2 that forms the chemical basis for all known organic life.
the noble gas (Group 0 / 18) that is in Period 3.
