|2||G or Bb||1||11th fretfr.||optionalopt.|
Guitar chords in the key of C major:
Chord C7 (8th fret) notes: C, G, Bb, E, G or (Bb) and C.
This chord is played by placing a barre on fret eight with your index finger. The note Bb on the second string is not required, but can be played on the 11th fret if needed.
C dominant 7th chord's alternative names: Cdom7, (C septim).
1(C), 3(E), 5(G), b7(A#/Bb).