In music, a scale is any set of musical notes ordered by fundamental frequency or pitch.
An arpeggio (it. /arˈpeddʒo/) is a musical technique where notes in a chord are played or sung in sequence, one after the other, rather than being played together like a chord. This word comes from the Italian word “arpeggiare”, which means “to play on a harp”. An alternative translation of this term is “broken chord”.