G7
G7 (G Dominant 7th) creates tension that resolves to C. It consists of G, B, D, and F notes.
Guitar Fretboard
Piano Keys
C
D
E
F
G
A
B
Notes: G - B - D - F
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How to Play G7 Chord
The G7 chord is made up of the notes G, B, D, F. On guitar, this chord uses the fingering pattern shown above, where "X" means don't play that string and "O" means play the open string.
On piano, simply press the G, B, D, F keys simultaneously. The visual diagram above highlights exactly which keys to press.