C7 7e Dominante Accord

The C 7e Dominante chord contains: C, E, G, A#.

These notes are derived by applying the dominant 7th interval formula (0–4–7–10 semitones) to the root note C.

A major triad with a minor seventh.

Creates harmonic tension that resolves to the tonic. The C7 chord is used across pop, rock, jazz, and classical music. As the I chord in the key of C major, it functions as the most stable resting point in progressions.

On piano, play C, E, G, A# simultaneously.

In root position, C is the lowest note. Inversions move the bass note up — first inversion has E lowest, second inversion has G lowest.

A dominant 7th chord has 4 notes: C, E, G, A# (in C).

It is a 7th chord, extending beyond the basic triad.

The C major chord (C–E–G) uses a major third (4 semitones), giving it a bright, happy sound.

The C minor chord (C–D#–G) uses a minor third (3 semitones), giving it a darker, emotional sound.

C7 naturally serves as the I chord in the key of C major.

It also appears as IV in the key of G major, and as V in the key of F major.

Yes.

The ukulele uses GCEA tuning with 4 strings. The C7 chord notes (C, E, G, A#) can be fretted on a ukulele, though the shapes differ from guitar due to the 4-string layout and shorter scale.

In the key of C major, C7 pairs naturally with F major (IV), G major (V), and Am (vi).

The classic I–IV–V (C7–F–G) is the foundation of blues, country, and rock.

An inversion places a non-root note in the bass.

C7 root position: C in bass. First inversion: E in bass. Second inversion: G in bass. Inversions create smoother bass line movement without changing the harmony.

Remember the formula: 0–4–7–10 semitones from root.

For C7: start on C, add 4 semitones, then 7 semitones, then 10 semitones. Practicing this across all 12 roots builds instant recognition of any dominant 7th chord.