[填空题]
The angular momentum 10 in the hydrogpiy9g7i ty48 9 t*mrdben atom ibqft8n9 28x4o b:cx0t9t vqess given both by the Bohr model and by quantum mechanics. 9to fv2bb:xq8e 4x9t80sn qtcCompare the results for $L = mvr$.
or $L_{\text{QM}}$ = $\hbar$. asdfasdofadsf