I might be mistaken but from my college chemistry I believe this is referring to VSEPR theory. Where electron pairs around a nucleus will push against each othe

I might be mistaken but from my college chemistry I believe this is referring to VSEPR theory. Where electron pairs around a nucleus will push against each other to maximize the distance between other pairs in spherical space. So two electron pairs would be separated by 180° (line) and 3 by 120° (3 lines on same plane), 4 by 120° (tetrahedron) and so on. So if it's 140° then something else is pushing against them as it should never be 140°. Someone more knowledgeable correct me if I'm mistaken.