An energy difference of 4×10-3 eV for the 3p subshell of sodium accounts for the how many splitting of a spectral line at 589.3 nm is ( )
举一反三
- When line 14 is reached， how many objects are eligible for the garbage collector？（） A: 0 B: 1 C: 2 D: 3 E: 4 F: 6
- How many documents are needed for a construction project? A: 3 B: 4
- If the K, L, and M energy levels of Pt are 78000 eV, 12000 eV and 30000 eV, respectively, the wavelength of Ka line from Pt is ( )
- How many municipalities are in China？（ ） A: 4 B: 5 C: 3 D: 6
- How many types of outlines are there? A: 1 B: 2 C: 3 D: 4