Chords are usually made up of combinations of major and minor third intervals. As mentioned previously, the simplest chords are made up of three notes. These are called triads. There are four basic types of triads: major, minor, augmented and diminished. Examples of each of these are shown below along with the formula for each one.
For every type of chord there is a corresponding arpeggio. Shown below is a C minor arpeggio which consists of the notes C, Eb and G which are the root, flattened third and fifth of a C minor chord.
This is a G minor arpeggio which consists of the notes G, Bb and D. These are the root, third and fifth of a G minor chord.
Here is an example which makes use of both major and minor arpeggios.