The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.
All day - to - day function of the Panchayat in which of the following states are being operated on electronic system and web-based?(this is being done for the first time in india for a Panchayat)