Relative novice here in music theory, forgive me. There's this fantastic rock riff, and I'm trying to figure out what they're doing in it. I know it's some simple chord progression, with the chords broken up and played highest note first, then lowest, then middle to give that great sense of progression. My problem is that I can't figure out which chords are being used. I've tried every combination of major chords, minor chords, seventh chords, suspended chords, and all their inversions, but for the life of me, I can't find anything that fits the notes.
Can someone help me figure this out? And is there a name for what they're doing here?
Edit: I just realized. I think arpeggio is the right term used to refer to this? Is that also the term they use in rock?