Dictionary: C7 Chord

C7 is a C major triad with a minor 7th (B-flat note).  This chord is compatible with the C Mixolydian mode.

Four 7th #Chords / Four Chords with a #Capo at the 3rd Fret for #Guitar

C7 (Guitar, Beginner)

You can pronounce C7 as either "C-seven" or "C-seventh."

1. Place your index finger on the B string, behind the 1st fret.
2. Place your middle finger on the D string, behind the 2nd fret.
3. Place your ring finger on the A string, behind the 3rd fret.
4. Place your pinky finger on the G string, behind the 3rd fret.
5. Avoiding the Low E string, strum the C7 chord.

As you can feel/hear, C7 is basically the C major chord, with an extra note...a very twangy note.