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 an 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 an Atom https://www.khanacademy.org/science/up-class-9th-science/x699e14d392a80aeb:structure-of-an-atom/x699e14d392a80aeb:models-of-an-atom/e/different-models-of-atom 2024-04-11T06:54:21.820529464Z Different models of Atom Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/bridge-course-class-11th-chemistry/x426c9d2c554669cb:basic-concepts-of-chemistry/x426c9d2c554669cb:structure-of-an-atom/e/electron-distribution-in-electron-orbits 2025-04-09T10:12:02.040424533Z Electron distribution in electron orbits Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:atomic-structure-and-properties/x2eef969c74e0d802:mass-spectrometry-of-elements/v/isotopes 2022-09-07T08:21:01.673602243Z Isotopes Isotopes are atoms of the same element with different numbers of neutrons. Because they contain different numbers of neutrons, isotopes have different atomic masses. The average atomic mass of an element is calculated by taking the weighted average mass of the element's naturally occurring isotopes. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/0a383f46-3f5b-4b2c-ad63-6338ab2a71be_1280_720_base.png Isotopes Isotopes are atoms of the same element with different numbers of neutrons. Because they contain different numbers of neutrons, isotopes have different atomic masses. The average atomic mass of an element is calculated by taking the weighted average mass of the element's naturally occurring isotopes. https://cdn.kastatic.org/ka-youtube-converted/ShC3VoxxW3g.mp4/ShC3VoxxW3g.mp4 328 Structure of an Atom https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:structure-of-the-atom/x46dd29ce84a663ea:atomic-number-mass-number-isotopes-and-isobars/v/worked-example-identifying-isotopes-and-ions 2021-03-18T10:33:23Z Worked example: Identifying isotopes and ions Identifying isotopes and ions from the number of electrons, protons and neutrons, and vice versa.  video https://cdn.kastatic.org/googleusercontent/lifCymNe8jSpWZ8PDns689V6TAPEOUKLR6BZvEYueut1r3KwY4GrgT9UmX5v5LOUff8kLwadt3nDhbugyVQHBGw Worked example: Identifying isotopes and ions Identifying isotopes and ions from the number of electrons, protons and neutrons, and vice versa.  https://cdn.kastatic.org/ka-youtube-converted/koAFBScR41A.mp4/koAFBScR41A.mp4 225 Structure of an Atom https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:structure-of-the-atom/x46dd29ce84a663ea:atomic-number-mass-number-isotopes-and-isobars/v/isobars 2023-06-26T12:36:08.867767149Z Isobars We've seen atoms of same elements with same atomic number but different atomic masses, but now, let's have a look at atoms of different elements with same atomic mass! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Isobars We've seen atoms of same elements with same atomic number but different atomic masses, but now, let's have a look at atoms of different elements with same atomic mass! https://cdn.kastatic.org/ka-youtube-converted/9xwmJ_aI-6o.mp4/9xwmJ_aI-6o.mp4 149 Structure of an Atom https://www.khanacademy.org/science/up-class-9th-science/x699e14d392a80aeb:structure-of-an-atom/x699e14d392a80aeb:atomic-and-mass-number-isotopes-and-isobars/e/isotopes-and-isobars-in 2024-09-13T06:08:49.52492197Z Isotopes and Isobars Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/up-class-9th-science/x699e14d392a80aeb:structure-of-an-atom/x699e14d392a80aeb:atomic-and-mass-number-isotopes-and-isobars/e/optional-more-questions-on-valency-atomic-and-mass-number-and-isotpes-isobars 2025-05-20T12:06:02.119690473Z More questions on Valency, Atomic and mass number, and Isotpes/Isobars Let's solve some questions! vibhor exercise