For main group elements (s- and p-block elements), the group number corresponds to the number of valence electrons. For example, carbon (C) is in Group 14, so it has 4 valence electrons.

For example, carbon (C) is in Group 14, so it has 4 valence ... the electron configuration of oxygen (O) is 1s 2 2s 2 2p 4, indicating it has 6 valence electrons. The electrons in the outermost ...