In music or music theory, the supertonic is the second degree or note of a diatonic scale (in other words, immediately "above" the tonic). For example, in the C major scale (white keys on a piano, starting on C), the supertonic is the note D; and the supertonic chord uses the notes D, F, and A. In music theory, the supertonic chord is symbolized by the Roman numeral II if major (for example D-F♯-A in C major with a sharpened third) or ii if minor (for example D-F-A in C major without any chromatic alteration).