(Solved): Specify the number of unshared pairs of electrons necessary to complete the valence shell of the l ...

Specify the number of unshared pairs of electrons necessary to complete the valence shell of the labeled atoms, a-c in the following structures. Specify " 0 " if no pair of electron needs to be added. Notice that formal charges are indicated by \( \oplus \) or \( \Theta \) and that the atoms are NOT labeled in sequence. \( 1 . \) a b c \( 2 . \) a b c