The B dominant seventh chord (abbreviated "B7 chord") is a four-note chord consisting of the notes B, D, F, and A. The chord is formed by adding a minor seventh to a B major chord.

Name
B dominant seventh chord
Synonym
B major-minor seventh chord
Notes
B D F A
Intervals
1 3 5 7
Chord symbol
B7
Type
Tetrad (four-note chord)

B7 chord on piano

B7 chord on guitar

B7 chord on ukulele

B7 chord on the staff