You have me today, Tomorrow you'll have more;
As your time passes,
I'm not easy to store;
I don't take up space,
But I'm only in one place;
I am what you saw,
But not what you see.
What am I?

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"