C Major Scale
C Major Scale consists of the following notes.
C D E F G A B
It includes all the white keys in a piano.
|C Major Scale|
The C Major Scale contains the following chords. At this point I am keeping this simple and so am displaying just the triads. A triad is a chord containing three notes. (Chords can contain more than three notes too).
C Major Chord:
|C Major Chord|
A 'C Major Chord' is also referred as the first chord in the C Major Scale. This is a major chord and so it is referred as Chord I or I.