[单选题]
The wave equation for hydrogen has solbdqhi v)8g ;1putions only if the three quantum numbers 9x8d.j tfp6q m$n$, $l$, and $m_l$ meet certain conditions. One of these conditions specifies that l
A. is either zero or +1.
B. is either equal to or less than n-1.
C. is a positive integer.
D. has an absolute value that is either equal to or less than n.
Post time 2024-1-22 00:52:27