What is a chord, you probably have already read, if you didn't know this before. When the sounds of the chord do not take at the same time, and turn, and it turns out arpeggios. Called this method of execution chord Italian word arpeggio (better to say - arpegio), which means "like a harp", because that's exactly what harp is most characteristic. You probably haven't heard the gentle play arpeggios in the harp performance.
And in the school of music beginner pianists develop technique by playing arpeggios together with compulsory schemes.
In the notes of the arpeggio are usually denoted by a wavy vertical line set before the finale.
If you want to perform arpeggio (or even say - arpeggiato) the number of chords, the notes next to these chords just write the Italian word arpeggio. Occasionally write little arpeggio notes, which are then sogovegeta - arcs connect with the main notes of the chord.
String stringed instruments all the chords are played only arpeggiato. These tools are designed so that while you can keep the bow only on two adjacent strings. If you want to capture still and the third, or all four, the musician has to "run" on them with a bow sounds will come not together though and very quickly one after the other.