https://www.khanacademy.org/science/telangana-class-10-physical-sciencein/x1ac9c643dc8dffee:structure-of-atom/x1ac9c643dc8dffee:models-of-an-atom/v/rutherfords-gold-foil-experiment-in 2025-05-24T09:35:11.484794851Z Rutherford's gold foil experiment Let's understand Rutherford's gold foil experiment! Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Rutherford's gold foil experiment Let's understand Rutherford's gold foil experiment! https://cdn.kastatic.org/ka-youtube-converted/Vh4ZSX_chpY.mp4/Vh4ZSX_chpY.mp4 684 Structure of the atom https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:structure-of-the-atom/x46dd29ce84a663ea:models-of-an-atom/v/drawback-of-the-rutherford-model 2023-06-26T12:36:08.867767149Z Drawback of the Rutherford model What are the drawbacks of the Rutherford model? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Drawback of the Rutherford model What are the drawbacks of the Rutherford model? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/NdjUIozumbE.mp4/NdjUIozumbE.mp4 223 Structure of the atom https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:structure-of-the-atom/x46dd29ce84a663ea:models-of-an-atom/v/bohr-s-model-of-an-atom 2023-06-26T12:36:08.867767149Z Bohr's model of an atom How did Bohr respond to the drawbacks in the Rutherford model? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Bohr's model of an atom How did Bohr respond to the drawbacks in the Rutherford model? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/haFTkhOcQaY.mp4/haFTkhOcQaY.mp4 130 Structure of the atom https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:structure-of-the-atom/x46dd29ce84a663ea:models-of-an-atom/e/atomic-structure 2026-04-03T18:30:01.793877038Z Atomic structure Test your knowledge of atomic structure! Ashley exercise https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:structure-of-the-atom/x46dd29ce84a663ea:how-are-electrons-distributed-in-various-shells/v/electron-distribution-in-shells 2023-06-26T12:36:08.867767149Z Electron distribution in shells How are electrons distributed in the shells around the nucleus? Do they follows any rules? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Electron distribution in shells How are electrons distributed in the shells around the nucleus? Do they follows any rules? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/H4bvY_CkSf0.mp4/H4bvY_CkSf0.mp4 605 Structure of the atom https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:structure-of-the-atom/x46dd29ce84a663ea:how-are-electrons-distributed-in-various-shells/e/electron-distribution-in-an-atom-and-calculation-of-valency 2026-04-07T09:22:30.618598699Z Electron distribution in an atom/ion and calculation of valency. Let's solve a few problems to calculate valency and see how electrons are distrubuted in an atom. Aanchal Arora exercise https://www.khanacademy.org/science/bmc-grade-9-science/x345505a97fc4a662:measurement-of-matter/x345505a97fc4a662:atoms-and-molecules/v/worked-example-atomic-weight-calculations 2025-05-29T08:44:44.739717086Z Worked example: Atomic weight calculations Let's learn how to calculate atomic weight from atomic mass and percent abundance of carbon isotopes. Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Worked example: Atomic weight calculations Let's learn how to calculate atomic weight from atomic mass and percent abundance of carbon isotopes. https://cdn.kastatic.org/ka-youtube-converted/3CYWrAZ4hME.mp4/3CYWrAZ4hME.mp4 267 Structure of the atom https://www.khanacademy.org/science/strengthened-shs-chemistry-1/x174677b2bfa4bea2:1st-quarter/x174677b2bfa4bea2:examples-of-isotopes/v/worked-example-identifying-isotopes-and-ions-dubv 2025-05-29T08:44:44.739717086Z Worked example: Identifying isotopes and ions Let's figure out how to identify isotopes and ions from the number of electrons, protons and neutrons, and vice versa. Dubverse video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Worked example: Identifying isotopes and ions Let's figure out how to identify isotopes and ions from the number of electrons, protons and neutrons, and vice versa. https://cdn.kastatic.org/ka-youtube-converted/RlegO58V8Bg.mp4/RlegO58V8Bg.mp4 224 Structure of the atom https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:structure-of-the-atom/x46dd29ce84a663ea:atomic-number-mass-number-isotopes-and-isobars/e/isotopes-and-isobars 2026-04-08T08:09:55.69362548Z Isotopes and Isobars Let's solve a few problems to understand the concept of isotopes and isobars. Aanchal Arora exercise