The key of F major
F G A B♭ C D E
1 flat: B♭. Relative minor: The key of D minor.
The triads of the key
I
F | ii
Gm | iii
Am | IV
B♭ | V
C | vi
Dm | vii°
E° |
The seventh chords
Imaj7
Fmaj7 | ii7
Gm7 | iii7
Am7 | IVmaj7
B♭maj7 | V7
C7 | vi7
Dm7 | viiø7
Em7♭5 |
F major scale
Open it in the app: 6. Harmony, in F