History of the periodic table and periodic trends ppt video the main group elements gamestrikefo Image collections
{"Image DocumentName": "The main group elements", "Image ImageDescription": ". Elements in groups 1, 2, and 13\u201318 are known as the main-group elements. Main-group elements are in the s- and p- blocks of the periodic table. The electron configurations of the elements in each main group are regular and consistent: the elements in each group have the same number of valence electrons. Four groups within the main-group elements have special names. These groups are: alkali metals (Group 1) alkaline-earth metals (Group 2) halogens (Group 17) noble gases (Group 18) The main group elements.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}