https://www.khanacademy.org/science/ap-biology/chemistry-of-life/introduction-to-biological-macromolecules/v/covalent-bonds 2023-12-18T19:15:22.874322042Z Covalent bonds Covalent bonds involve shared electron pairs between atoms. Each atom contributes one electron to each shared pair, and effectively gains an additional electron from the shared pair. Atoms share the same number of pairs needed to fill their valence shell, usually with eight. Hydrogen only needs one additional electron to fill its valence shell, so it shares only one pair. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/c5b45032-3e0e-4dc5-bfbe-fbeb4412d879_1280_720_base.png Covalent bonds Covalent bonds involve shared electron pairs between atoms. Each atom contributes one electron to each shared pair, and effectively gains an additional electron from the shared pair. Atoms share the same number of pairs needed to fill their valence shell, usually with eight. Hydrogen only needs one additional electron to fill its valence shell, so it shares only one pair. https://cdn.kastatic.org/ka-youtube-converted/kS5iU4v0QZk.mp4/kS5iU4v0QZk.mp4 343 Covalent bond https://www.khanacademy.org/science/grade-9-chemistry-snc-aligned/x22d5b83c2ea2dc38:chemical-bonding/x22d5b83c2ea2dc38:covalent-bond/v/covalent-bond-ur 2025-08-08T00:24:37.843818748Z Covalent bond Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Covalent bond Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/yPwv70VkyfU.mp4/yPwv70VkyfU.mp4 754 Covalent bond https://www.khanacademy.org/science/telangana-class-10-physical-sciencein/x1ac9c643dc8dffee:carbon-and-its-compounds/x1ac9c643dc8dffee:bonding-in-carbon-covalent-bond/a/single-and-multiple-bonds-class-10-chemistry 2021-04-29T07:48:34Z Single and multiple covalent bonds article https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:elements-and-compounds/x19bc096754f0b9af:elements-atoms-and-molecules/v/covalent-bond-molecules-with-same-atoms-ur 2025-08-07T23:35:51.501752344Z Covalent bond: Molecules with same atoms Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Covalent bond: Molecules with same atoms Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/U-ShBJ_T6C4.mp4/U-ShBJ_T6C4.mp4 289 Covalent bond https://www.khanacademy.org/science/bridge-course-class-11th-chemistry/x426c9d2c554669cb:chemical-bonding/x426c9d2c554669cb:basics-of-covalent-bonding/e/covalent-bonding-molecules-with-same-atoms 2026-04-08T00:36:09.500768563Z Covalent bonding: Molecules with same atoms Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:elements-and-compounds/x19bc096754f0b9af:compounds/v/covalent-bond-molecules-with-different-atoms-ur 2025-08-07T23:35:51.501752344Z Covalent bond: Molecules with different atoms Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Covalent bond: Molecules with different atoms Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/jtP3y2KUHK4.mp4/jtP3y2KUHK4.mp4 346 Covalent bond https://www.khanacademy.org/science/bridge-course-class-11th-chemistry/x426c9d2c554669cb:chemical-bonding/x426c9d2c554669cb:basics-of-covalent-bonding/e/covalent-bonding-molecules-with-different-atoms 2026-04-08T01:15:04.085520103Z Covalent bonding: Molecules with different atoms Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/ap-biology/chemistry-of-life/introduction-to-biological-macromolecules/a/chemical-bonds-article 2021-04-29T07:53:29Z Chemical bonds Chemical bonds hold molecules together and create temporary connections that are essential to life. Types of chemical bonds including covalent, ionic, and hydrogen bonds and London dispersion forces. article https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:intermolecular-forces-and-properties/x2eef969c74e0d802:properties-of-solids/v/covalent-network-solids 2021-03-23T22:19:10Z Covalent network solids Covalent network solids are composed of atoms covalently bonded together into a three-dimensional network or layers of two-dimensional networks. Due to the strength of the covalent bonds, covalent network solids have high melting points. Three-dimensional network solids (such as diamond or silica) are hard and rigid, whereas two-dimensional network solids (such as graphite) are soft due to the ease with which the network layers can slide past each other. Sal Khan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Covalent network solids Covalent network solids are composed of atoms covalently bonded together into a three-dimensional network or layers of two-dimensional networks. Due to the strength of the covalent bonds, covalent network solids have high melting points. Three-dimensional network solids (such as diamond or silica) are hard and rigid, whereas two-dimensional network solids (such as graphite) are soft due to the ease with which the network layers can slide past each other. https://cdn.kastatic.org/ka-youtube-converted/le-ttBDN_FM.mp4/le-ttBDN_FM.mp4 244 Covalent bond