How many sharps or flats are in C major?

None. C major uses only the white keys.

What are the chords in C major?

C (I), Dm (ii), Em (iii), F (IV), G (V), Am (vi) and Bdim (vii°).

A minor. It uses exactly the same notes and the same key signature, but treats A as home.

G, the V chord. It creates the strongest pull back to C.

Key

The key of C major has no sharps or flats. Its scale is C, D, E, F, G, A and B.

Key signature

Start on C and tap each note of the C major scale going up.

0 of 7 notes

Stack every other note of the scale on each step and you get these chords. I, IV and V carry most songs: I is home, IV moves away, V pulls back home.