https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:classifying-matter/xc370bc422b7f75fc:compounds/v/compounds-and-chemical-formulas 2025-01-16T17:32:17.772857468Z Compounds and chemical formulas Some substances, like copper or gold, are pure elements. Others, like water (H₂O), are compounds—made from two or more elements in fixed ratios, chemically bonded. Each compound has a unique formula, like CO₂ for carbon dioxide, representing its specific atomic arrangement. Compounds form molecules, tightly bonded units, creating an incredible diversity of substances in nature. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/e3e4181e-5236-462c-82b7-64099d59b95c_1280_720_base.png Compounds and chemical formulas Some substances, like copper or gold, are pure elements. Others, like water (H₂O), are compounds—made from two or more elements in fixed ratios, chemically bonded. Each compound has a unique formula, like CO₂ for carbon dioxide, representing its specific atomic arrangement. Compounds form molecules, tightly bonded units, creating an incredible diversity of substances in nature. https://cdn.kastatic.org/ka-youtube-converted/36nlbUdRvUM.mp4/36nlbUdRvUM.mp4 361 Molecular and empirical formulas https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:structure-of-nature-and-matter/x0c8b40bd4b242f0b:elements-compounds-and-symbols-of-elements/e/symbols-and-molecular-formula-of-elements 2026-04-08T00:36:09.500768563Z Symbols and Chemical formula of elements and compounds Let's identify symbols and write molecular formula of elements Vibhor Pandey exercise