G 9th chord
G9 chord (also called Dominant 9th chord) for piano presented by keyboard diagrams.
Explanation: The G ninth is a five-note chord. Due to practical circumstances, however, the fifth (D) is often omitted and/or the chord is played inverted. The chord is often abbreviated as G9.
Theory: The G ninth chord is constructed with a root, a major third, a perfect fifth, a minor seventh and a major ninth.
Notes: G - B - D - F - A