https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:atoms-elements-and-compounds/x8bc8fb44369617ed:atomic-structure-and-the-periodic-table/v/electron-distribution-in-shells-ur 2025-08-08T00:24:37.843818748Z Electron distribution in shells Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Electron distribution in shells Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/9elgLcy86X0.mp4/9elgLcy86X0.mp4 605 Electronic configuration https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:atoms-elements-and-compounds/x8bc8fb44369617ed:atomic-structure-and-the-periodic-table/e/electronic-configuration-and-atomic-number 2026-04-07T22:59:30.107127435Z Electronic configuration of elements: KLMN shells. Let's practice to write the electronic configuration of a neutral atom. Chaitra exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:the-periodic-table/e/apply-number-of-valence-electrons 2026-04-26T16:30:39.382257956Z Apply: Number of valence electrons Apply your knowledge of valence electrons for main group elements in this set of free practice questions. Emily Cizmas exercise