The A dominant seventh chord (abbreviated "A7 chord") is a four-note chord consisting of the notes A, C, E, and G. The chord is formed by adding a minor seventh to a A major chord.

Name
A dominant seventh chord
Synonym
A major-minor seventh chord
Notes
A C E G
Intervals
1 3 5 7
Chord symbol
A7
Type
Tetrad (four-note chord)

A7 chord on piano

A7 chord on guitar

A7 chord on ukulele

A7 chord on the staff