I read that when you take away the fifth in a seventh chord it's still considered a seventh chord. But how would you differentiate between a seventh chord with a fifth and without one? Like is there a Gmaj7Without5 or some other notation?

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    I think you are missing the point of why the 5th can be omitted. It's very strongly applied especially when the chord is in root position so with or without the 5th the chord doesn't really change that much harmonically and if you cared about the voicings to this level, you would not use chord symbols you would use another more exact notation like sheet music or even tablature. – Dom Oct 19 '19 at 5:39
  • On the stave, it's explicit either way. – Tim Oct 19 '19 at 7:09

It's very common in guitar chord voicings to omit the fifth without any specific marking for it, these are called "shell chords" (https://www.jazzguitarlessons.net/blog/shell-voicings-jazz-guitar)

The fifth isn't a "guide tone," like the root or 3 or 7 which determines the quality of the chord (happy/sad/dominant/dissonant). It's a perfect interval, emotionally neutral and functionally just amplifying the main harmonics of the root. When you leave out the 5, the chord sounds less crowded and you can hear more of those guide tones that strengthen the harmonies.

But as the other answer mentions, the "no5" notation is sometimes used to be extra specific.

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I've seen formatting like Gma7(no5) in guitar tabs. No idea if its standard or used in other contexts.

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