[填空题]
The angular momentum 10 in the hydrogen atom is gi m8e z y+p 4:aoodj-res,csn sf,ig-iha0b7/ (ven e+oxa3r 6ebi; both by the Bohr model and by quantum ;ei+r3ba6x oe mechanics. Compare the results for $L = mvr$.
or $L_{\text{QM}}$ = $\hbar$. asdfasdofadsf