Patients who waited more than 6 months to receive cataract surgery experienced more vision loss, a reduced quality of life and had an increased rate of falls compared with patients who had wait times of less than 6 weeks.
Group 16 is the oxygen family. It consists of the elements oxygen, sulfur, selenium, tellurium, and polonium. Each has six of the desired eight electrons required for the octet in its highest energy level.
Group 0 elements are on the far right of the periodic table with a very stable completely filled shell of outer electrons. 1  You would expect them to be very unreactive non-metals. 2  The Group 0 Noble Gases are colourless nonâmetals with very low melting and boiling points (they are all gases at room temperature).