C minor
The C minor chord consists of the C (Perfect unison), D# (Minor third) and G (Perfect fifth) notes.

How to play the C minor chord
- Find C (Root) on the piano keyboard
- Add D# (Minor third) — 3 semitones above C
- Add G (Perfect fifth) — 7 semitones above C
- Press all 3 notes simultaneously to sound the C minor chord