First excited hydrogen eigenspace
= First excited hydrogen eigenspace
The $n=2$ eigenspace has basis
$$
|2,0,0\rangle,\quad
|2,1,-1\rangle,\quad
|2,1,0\rangle,\quad
|2,1,1\rangle.
$$
= First excited hydrogen eigenspace
The $n=2$ eigenspace has basis
$$
|2,0,0\rangle,\quad
|2,1,-1\rangle,\quad
|2,1,0\rangle,\quad
|2,1,1\rangle.
$$