Music Theory: V Dominant Chords

V Dominant Chords (Dominant 7th): Dominant 7th Chords function as the 5th (5th Scale degree) in the scale. Dominant Chords contain the "Tri-Tone" (6 Half Steps apart) which helps define tonality. The Tri-Tone is the two Half Steps that exist in the Major Scale (the 4th and 7th scale degrees). Dominant Chords allow for lots of extensions and alterations as they can be built using different temporary scales.

dominant chords and alterations