https://www.khanacademy.org/science/mh-grade-8-science/x0f256b8de9c7cf34:composition-of-matter/x0f256b8de9c7cf34:molecular-formula-and-valency/v/valency-1-in 2025-09-22T21:00:45.252280137Z Valency - 1 What is valency and how do valence electrons help atoms bond? Learn with real examples like O, F, Na, Mg, Cl, C, and Si, and understand how the octet rule guides bonding in this middle school chemistry video! Joel Prakash Stephen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Valency - 1 What is valency and how do valence electrons help atoms bond? Learn with real examples like O, F, Na, Mg, Cl, C, and Si, and understand how the octet rule guides bonding in this middle school chemistry video! https://cdn.kastatic.org/ka-youtube-converted/ysWkiAgri3w.mp4/ysWkiAgri3w.mp4 400 Molecular Formula and Valency https://www.khanacademy.org/science/mh-grade-8-science/x0f256b8de9c7cf34:composition-of-matter/x0f256b8de9c7cf34:molecular-formula-and-valency/v/valency-2 2025-07-31T18:24:19.362506289Z Valency - 2 What is valency and how does it help predict the number of bonds an atom can form? Learn through real examples like HCl, MgCl₂, H₂O, CH₄, and CO₂ in this fun and clear middle school chemistry video! Joel Prakash Stephen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Valency - 2 What is valency and how does it help predict the number of bonds an atom can form? Learn through real examples like HCl, MgCl₂, H₂O, CH₄, and CO₂ in this fun and clear middle school chemistry video! https://cdn.kastatic.org/ka-youtube-converted/i5bEGnF9w8A.mp4/i5bEGnF9w8A.mp4 387 Molecular Formula and Valency https://www.khanacademy.org/science/mh-grade-8-science/x0f256b8de9c7cf34:composition-of-matter/x0f256b8de9c7cf34:molecular-formula-and-valency/v/criss-cross-method 2026-02-04T04:44:34.932566905Z Criss-Cross Method Learn how to use the criss-cross method to find molecular formulas of compounds like H₂O, NaCl, CO₂, Al₂O₃, and more! Joel Prakash Stephen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Criss-Cross Method Learn how to use the criss-cross method to find molecular formulas of compounds like H₂O, NaCl, CO₂, Al₂O₃, and more! 442 Molecular Formula and Valency