C major
G major
D major
A major
E major
B major
F♯ major
C♯ major
F major
B♭ major
E♭ major
A♭ major
Each key is associated with a specific set of notes and chords that are used to create melodies and harmonies within that key. For example, the key of C major uses the notes C, D, E, F, G, A, and B, and the chords C major, D minor, E minor, F major, G major, A minor, and B♭ major.
The choice of key can influence the mood and character of a piece of music. For example, major keys are often associated with bright, cheerful, and uplifting emotions, while minor keys are often associated with more sombre, melancholic, or dramatic emotions.