Major (Ionian)

Learning from key C.

Triads

• C: 1-3-5 (1 3 5)
• Dm: 2-4-6 (1 b3 5)
• Em: 3-5-7 (1 b3 5)
• F: 4-6-1 (1 3 5)
• G: 5-7-2 (1 3 5)
• Am: 6-1-3 (1 b3 5)
• Bdim: 7-2-4 (1 b3 b5)

Shape

• 1st Inversion

• 2nd Inversion

Seventh Chord

• CM7: 1-3-5-7 (1 3 5 7)
• Dm7: 2-4-6-1 (1 b3 5 b7)
• Em7: 3-5-7-2 (1 b3 5 b7)
• FM7: 4-6-1-3 (1 3 5 7)
• G7: 5-7-2-4 (1 3 5 b7)
• Am7: 6-1-3-5 (1 b3 5 b7)
• Bm7(b5): 7-2-4-6 (1 b3 b5 b7)

[note]:

1. Bm is 7-2-#4 and Bm7 is 7-2-#4-6.
2. Half-diminished seventh: 1 b3 b5 b7
3. Diminished seventh: 1 b3 b5 bb7

Reference:

• Seventh Chord

External Reading:

• Key Signature
• Arppegio