a. Is a 4p S 4s transition allowed in sodium? If so, what is its wavelength (in nm)? If not, why not? b. Is a 3d S 4s transition allowed in sodium? If so, what is its wavelength (in nm)? If not, why not?

Ch.9:CenterofMassandMomentum A. ChapterGoals • Studyofwhatiscenterofmass • Studyofwhatislinearmomentumandwhenitconserves • StudyofwhatisImpulseandwhatisimpulse-momentum theorem • Studyofwhatiscollisionandwhatareelas▯c,inelas▯c, andperfectinelas▯ccollisions • Studyofwhatthemechanismforrocketpropulsion...