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Formal charges for C, N, O

Grabbable 1 of 4.one
Grabbable 2 of 4.two
Grabbable 3 of 4.three
Grabbable 4 of 4.four
Dropzone 1 of 9.
C+
Dropzone 2 of 9.
C_0
Dropzone 3 of 9.
C-
Dropzone 4 of 9.
N+
Dropzone 5 of 9.
O+
Dropzone 6 of 9.
N_0
Dropzone 7 of 9.
N-
Dropzone 8 of 9.
O_0
Dropzone 9 of 9.
O-