Hey @cajarmj61, you can always just start a new thread, either in #gear or #technique if it’s related to one of those things, but if not just stick it in #chat .
Simple version (basically what @joergkutter said):
Arpeggio - single notes, C then E then G = C major (triad) arpeggio
Chord - notes played together, CEG all at once = C major (triad) chord
But in musical context, you might be playing over a “chord progression,” whether the keyboard or guitar is playing chords, and you’re using the corresponding arpeggios to make up bass lines, so sometimes you’ll hear the word “chord” even when you’re not playing one.
An actual “bass chord” is a less common but awesome way of playing, where you actually play multiple notes at once, like @joergkutter said.
And @funplumbin1, I agree with Joe @Jazzbass19, if you just keep trying to listen for it, you’ll get better at it naturally. And listen to music where the bass is featured prominently! It’s harder to pick out if it’s just following the rhythm guitar or something.