Main-group element Main-group element In chemistry and atomic physics, the main group is the group of elements whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements. The main group includes the elements (except hydrogen, which is sometimes not included) in groups 1 and 2 (s-block), and groups 13 to 18 (p-block). The s-block elements are primarily characterised by one main oxidation state, and the p-block elements, when they have multiple oxidation states, often have common oxidation states separated by two units. Main-group elements (with some of the
Human Element Human Element Human Element was an online multiplayer video game under development by Robotoki for Microsoft Windows, PlayStation 4, and Xbox One. Development was halted when the studio was closed as indicated by a farewell message on Robotoki's (now defunct) blog on January 20, 2015, by the studio's founder, Robert Bowling. "Human Element" is the first game being developed by the independent game company Robotoki, which was formed by Robert Bowling after he left Infinity Ward following the release of "". The premise of the game centers on the question, "What is the greatest threat in a zombie apocalypse?"; Bowling