Tell me more ×  I play guitar, and am attempting to teach myself
the piano. Which notes from a scale form the chord on the
keyboard? Is there a common rule for this?  Thank you for your
time.  share|improve this question What kind of chord? There are
many varieties, and they all exist on the guitar as well. – 
Matthew Read Apr 26 '11 at 19:16 which notes from a scale form a
chord isn't anything specific to a guitar or keyboard so I'm not
sure I understand the question as asked. Are you asking how to
voice a particular chord? e.g. which C, E and G to play if
playing a C major chord? –  James Tauber May 5 '11 at 14:12 add
comment  6 Answers  up vote 10 down vote accepted  Any keys you
like. A chord in just two notes played at the same time,
although typically three or more is used. Now, most combinations
will sound bad of course (at least for a certain value of bad,
it's all subjective) so the question rather needs to be
specified into which chord you mean.  The rules to form nice
sounding chords are complicate