hello everybody my name is Iman welcome back to my YouTube channel we've made it to the fifth video in this high yield mcap General chemistry playlist and this video is about B's model of the hydrogen atom part three now today we're going to talk about spectral Series in hydrogen we're going to cover a couple of important series as it relates to the hydrogen emission spectrum and we're going to cover a really important equation here in this video today now within the hydrogen atom according to B's model electrons occupy certain energy levels n = 1 n = 2 N = 3 and so on and so forth now when an electron transitions between these levels it emits or absorbs a photon whose energy is equal to the difference in energy between these levels so if you if an electron is transitioning from n = 1 to Nal 2 it has to absorb a photon that is whose energy is equal to the difference in energy between Nal 1 and n = 2 now this is described by the equation that we see right here energy equals Plank's constant multiplied by the speed of light divided by wavelength and this is equal to minus RH this is the ridberg constant multiplied by 1/ N1 s - 1/ N2 2 here N1 is the initial energy level N2 is the final energy level now something that's also important for us to understand is a couple of important series and this image depicts these three important series we should be familiar with the Lyman series bomber and pasin series these are um extremely important in the hydrogen emission Spectra and I'm going to go ahead and Define them all right starting with the lion series The Lyman series includes transitions from higher energy levels n greater than one all right and it's going to transition from that higher energy level to that first energy level so you're going from n equal some number greater than one all the way down to n equal 1 all right so this is a transition from a higher energy level to the first energy level and this is going to result in the emission of UV light all right emission of UV light then we have the bomber Series this consists of transition from higher energy level specifically n greater than two to the second energy level and this transition results in the emission of visible light all right visible light and then you have the pasin series all right and I've heard this pronounced a couple of different ways so forgive me if I am mispronouncing it um but for this transition you're transitioning from higher energy levels n greater than 3 all right and it is transitioning down to nals 3 okay and this kind of series emits um light in the IR region okay it emits light in the IR region so it emits IR light so this is the three kinds of series we should be familiar with for the MCAT the Lyman series all right transition from higher energy level to the first energy level emits UV light bomber series transition from higher energy level to the second energy level this results in the emission of visible light and the pasin series result uh transitions from higher energy levels to the third energy level resulting in the emission of IR light each series is named after the scientists who discovered them and characterized them by the range of photon wavelengths emitted as a result of of course the electron transition now B's model was a precursor to Modern quantum mechanics and while it successfully explained the hydrogen Spectrum it couldn't accurately predict Spectra for more complex atoms the quantized nature of electron energy levels and the spectral lines they produce were just a stepic Stone to the development of quantum mechanics and quantum mechanics is a lot more complicated than just this simple idea we've covered here today about B's model of the hydrogen atom thankfully though it's not on the mcap thank God right now quantum mechanics really provides um a comprehensive framework for beginning to understand Atomic and subatomic processes and it goes beyond fixed orbits to a more probabilistic description of electron positions and energies again we don't need to know any of any advanced quantum mechanics but we what we will need to know and cover is just a little bit about the quantum mechanical model of atoms and that is our next topic so I hope this was helpful let me know if you have any questions comments concerns down below other than that good luck happy studying and have a beautiful beautiful day future doctors love you