https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:the-periodic-table/v/periodic-table-introduction 2024-01-03T14:14:18.294406117Z The periodic table The periodic table organizes elements into groups and periods based on their chemical and physical properties. Elements in the same group share similar characteristics, like reactivity. The table is divided into metals, nonmetals, and metalloids, each with distinct properties. Key groups include alkali metals, alkaline earth metals, halogens, and noble gases. Jay video https://cdn.kastatic.org/googleusercontent/93FeEfrl_y0KtM_WRXilR41NTHLkCZ-Nkru8Ur4Uil0CjC7YODnZxTQs3PHhbj3zTCj1qgPwosPW2wBJP-nUnaRw The periodic table The periodic table organizes elements into groups and periods based on their chemical and physical properties. Elements in the same group share similar characteristics, like reactivity. The table is divided into metals, nonmetals, and metalloids, each with distinct properties. Key groups include alkali metals, alkaline earth metals, halogens, and noble gases. https://cdn.kastatic.org/ka-youtube-converted/t_f8bB1kf6M.mp4/t_f8bB1kf6M.mp4 536 Periodic table https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:the-quantum-model/v/orbitals 2020-09-23T19:58:37Z Shells, subshells, and orbitals The electrons in an atom are arranged in shells that surround the nucleus, with each successive shell being farther from the nucleus. Electron shells consist of one or more subshells, and subshells consist of one or more atomic orbitals. Electrons in the same subshell have the same energy, while electrons in different shells or subshells have different energies. Sal Khan video https://cdn.kastatic.org/googleusercontent/l1scWG8pLvaiTU-leH4UZrqPtmfcaRMt9LJcg7VC3TPuoLK6b3yfeNk37h9Lzj4cjMSkWIrIxwRMnrxwDuHogTUb Shells, subshells, and orbitals The electrons in an atom are arranged in shells that surround the nucleus, with each successive shell being farther from the nucleus. Electron shells consist of one or more subshells, and subshells consist of one or more atomic orbitals. Electrons in the same subshell have the same energy, while electrons in different shells or subshells have different energies. https://cdn.kastatic.org/ka-youtube-converted/26PF9Ctch9Y.mp4/26PF9Ctch9Y.mp4 581 Periodic table https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:the-quantum-model/a/the-periodic-table-electron-shells-and-orbitals-article 2024-02-03T14:54:13.458936091Z The periodic table, electron shells, and orbitals article https://www.khanacademy.org/science/grade-11-chemistry-snc-aligned/x203b0fc81a964b2d:periodic-table-and-periodic-properties/x203b0fc81a964b2d:periodic-table/e/periodic-classification--identify-the-laws 2026-02-27T12:30:36.531197313Z Periodic classification: Identify the laws Let's practice on identifying the different laws such as -Dobereiner's law, Newland's law, Mendeleev's law, Modern periodic law- by recalling periodic laws of classification. Chaitra exercise