A major chord consists of three specific notes: the root note, the major third, and the perfect fifth. For example:
- In C major, the notes are C (root), E (major third), and G (perfect fifth).
- In G major, the notes are G (root), B (major third), and D (perfect fifth).
- In A major, the notes are A (root), C# (major third), and E (perfect fifth).
If you provide a set of notes or a specific chord name, I can help you identify whether it is a major chord or not.