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 and 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. This means there are major, minor, augmented, diminished, dominant seventh and minor seventh arpeggios among others. 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 a picking part using both major and minor arpeggios.