Sulfur exists in two allotropic forms. Allotropes are forms of an element with different physical and chemical properties. The two forms of sulfur are known as Î±-form and Î²-form (the Greek letters alpha and beta, respectively).
National Organizations American Psychological Association (APA) The American Psychological Association (APA) is located in Washington, D.C., and is the largest scientific and professional organization representing psychology in the United States. APA was founded at the turn of the 20th century, and is the world's largest association of psychologists. APA - Division 16 - Division of School Psychology
This storied organization began at Clark University with a mere 31 members, and today it has more than 154,000 members in 54 different subfields of psychology. The APA is the largest association of psychologists in the world, and itâs easy to see why membership in this community is important for your career.