|6||x or G||3rd fretfr.||optionalopt.|
Guitar chords in the key of C major:
Chord C7 (3rd fret) notes: (G), C, G, Bb, E and G.
This chord is played by placing a barre on fret three with your index finger. The note G on the sixth string is not required, but can be played on the 3rd fret if needed.
C dominant 7th chord's alternative names: Cdom7, (C septim).
1(C), 3(E), 5(G), b7(A#/Bb).