My Guitar Web Site

I checked out your site.  Its okay, but I did see a few missteps.  Any article that explains modes without how to apply it is just playing an extended Major scale, in practice.  Two notes played together are not a "chord", they are a double stop.  A power chord is not a chord at all, but a double stop

In your scales section you write the following:

To play a scale in the key of “G#” ,  place the entire major scale pattern, starting with the first degree, on the “G#” fret. The second degree will naturally fall on “A#,” the third on “C,” and so forth.

The 3rd degree of G# would not be a C.  It would be a B#.  Functionally this would be the 3rd, and any kind of C is considered a 4th. 

Instructor

What if you include the octave note and play three strings - I assume that you would still call this a power chord and it would still be a chord not a double stop?

It is correct to say this but also important to point out that B# is actually a C.  It comes down to the way that scales are labeled. So there is only ever one instance of each letter spelling the scale.

To sharp a note means that it is moved up one fret (semitone) to in this instance the B is moved up one semitone to the C. However, to 'spell' the scale correctly it is refereed to as B# as the next note is C#.