Notes: C, Db, Eb, F, G, A, and B - Key: C - Origin: Italian - Category: Octatonic Scales
The C Neapolitan Major uses eight notes per octave. Because of this same reason it is a member of the so called Octatonic -scales that have Eight-note (or Eight-tone). On the piano keyboard, it is made up of two black keys: Db, and Eb and five white keys: C, F, G, A, and B. This combination makes this scale - as well as the C Arezzo Major Diatonic Hexachord, C Enigmatic, and C Neapolitan Minor - as great choices for composing or improvising Italian music.
If we take a look a the key signature of the C Neapolitan Major Scale we can find it has two flats and no sharps. Therefore, on sheet music you will find two accidentals on the score. The notes of this scale are: C, Db, Eb, F, G, A, and B.