Bb fifth chord

Bb5 chord for piano with keyboard diagram.
Explanation: The B flat fifth is a two note chord (since no third is included, it is neither a major nor minor chord). The chord is abbreviated Bb5.
Theory: The Bb5 chord is constructed with a root and a fifth. It is common to also include the first note again one octave up.

Bb5

Bb6/9 chord diagram
Notes: Bb - F

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Bb chord categories

Bb Bbm Bb7 Bbm7 Bbmaj7 Bb6 Bbm6 Bb6/9 Bb5 Bb9 Bbm9 Bbmaj9 Bb11 Bb13 Bbadd Bb7-5 Bb7+5 Bbsus Bbdim Bbaug