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.
Answer There are 18 groups across the periodic table, and they are numbered 1 through 18. Group 1:Alkali Metals* Group 2:Alkaline Earth Metals Groups 3-12: Transitional Metals Groups 13&14: Unnamed Group 15:Pnictogens or Pnicogens) Group 16: Chalcogens Group 17: Halogens Group 18: Noble Gases *excluding hydrogen (hydrogen is in its own group).