to correctly pin down what chord it is, we need a little more.
with 2 notes, we can identify Intervals.
with 3 notes, we can identify triads such as
X major - 1, 3, 5
X minor - 1, 3b, 5
X sus - 1, 4, 5
X aug - 1, 3, 5#
with 4 notes, we can identify 7th
X7 - 1, 3, 5, 7b
X major 7 - 1, 3, 5, 7
X minor 7 - 1, 3b, 5, 7b
X diminish - 1, 3b, 5b, 7bb
there are many other possiblilties
X minor major 7 ( XmM7 ) - 1, 3b, 5, 7
we can then move to more complex chords that uses the 9th, 11th, 13th note. but to go into all these, we need to have a good knowledge of scales and their key signature. :wink:
*oh, there are different ways to write chords too. for example, XM-7. the (-) means to lower that note by a semi-tone.