https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:mass-spectrometry-of-elements/v/mass-spectrometry 2022-10-05T02:43:18.611402953Z Mass spectrometry In the analytical technique of mass spectrometry, atoms or molecules are ionized using a high-energy electron beam and then separated based on their mass-to-charge ratios (m/z). The results are presented as a mass spectrum, which shows the relative abundances of the ions on the y-axis and their m/z ratios on the x-axis. This data can be used to calculate the exact masses of the atoms or molecules in the sample. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/3c3932d6-ff0c-4228-94e1-46f0d93b935a_1280_720_base.png Mass spectrometry In the analytical technique of mass spectrometry, atoms or molecules are ionized using a high-energy electron beam and then separated based on their mass-to-charge ratios (m/z). The results are presented as a mass spectrum, which shows the relative abundances of the ions on the y-axis and their m/z ratios on the x-axis. This data can be used to calculate the exact masses of the atoms or molecules in the sample. https://cdn.kastatic.org/ka-youtube-converted/myolF-h1kKI.mp4/myolF-h1kKI.mp4 258 Atomic spectra https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:mass-spectrometry-of-elements/v/worked-example-identifying-element-from-mass-spectrum 2022-10-05T02:43:18.611402953Z Worked example: Identifying an element from its mass spectrum Using mass spectrometry data, we can estimate an element's average atomic mass and determine its identity. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/ac8f35bf-5f2f-4104-89c5-ce8004ea5156_1280_720_base.png Worked example: Identifying an element from its mass spectrum Using mass spectrometry data, we can estimate an element's average atomic mass and determine its identity. https://cdn.kastatic.org/ka-youtube-converted/vU7MDe4ph5A.mp4/vU7MDe4ph5A.mp4 201 Atomic spectra https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:mass-spectrometry-of-elements/a/isotopes-and-mass-spectrometry 2022-01-11T22:17:00.362877679Z Isotopes and mass spectrometry article https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:mass-spectrometry-of-elements/e/mass-spectrometry-of-elements 2023-08-07T17:25:22.494770007Z Mass spectrometry of elements Practice interpreting mass spectrometry data in this set of free questions designed for AP Chemistry students. Lauren Rosebrugh exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:the-bohr-model-and-atomic-spectra/v/atomic_spectra 2024-06-10T02:56:50.336884637Z Atomic spectra Electrons only exist at specific, discrete energy levels in an atom. If an electron absorbs a photon with energy equal to the difference between two energy levels, the electron will transition to the higher energy level. The atom is then in an excited state. When an electron transitions to a lower energy level, it emits a photon with energy equal to the difference. Every element has a unique emission/absorption spectrum, making atomic spectral lines a valuable tool for identifying elements in distant astronomical objects. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/be385b3f-5a8b-4b49-a635-f562d1816780_1280_720_base.png Atomic spectra Electrons only exist at specific, discrete energy levels in an atom. If an electron absorbs a photon with energy equal to the difference between two energy levels, the electron will transition to the higher energy level. The atom is then in an excited state. When an electron transitions to a lower energy level, it emits a photon with energy equal to the difference. Every element has a unique emission/absorption spectrum, making atomic spectral lines a valuable tool for identifying elements in distant astronomical objects. https://cdn.kastatic.org/ka-youtube-converted/N0lBsW3ZzN8.mp4/N0lBsW3ZzN8.mp4 883 Atomic spectra https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:the-bohr-model-and-atomic-spectra/a/atomic-spectra 2026-01-08T23:15:10.14632616Z Atomic spectra Learn about modern atomic theory, electron excitation, and atomic spectra using PhET's "Models of the hydrogen atom" simulation. article https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:the-bohr-model-and-atomic-spectra/e/apply-atomic-spectra 2026-03-18T09:00:44.76761874Z Apply: atomic spectra Apply your understanding of atomic spectra in this set of free practice questions. Emily Cizmas exercise