https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:classifying-matter/xc370bc422b7f75fc:mixtures/v/types-of-mixtures-ms 2025-01-16T17:32:17.772857468Z Types of mixtures A mixture is a physical blend of two or more substances, unlike pure substances such as elements or compounds. Homogeneous mixtures are uniform throughout, with components evenly distributed at a molecular level, while heterogeneous mixtures have visible separation between components. Physical properties like density or solubility allow separation without a chemical reaction. Examples include salt water (homogeneous) and oil and water (heterogeneous). Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/fdb448a7-a551-4497-81f5-704e5ff938e0_1280_720_base.png Types of mixtures A mixture is a physical blend of two or more substances, unlike pure substances such as elements or compounds. Homogeneous mixtures are uniform throughout, with components evenly distributed at a molecular level, while heterogeneous mixtures have visible separation between components. Physical properties like density or solubility allow separation without a chemical reaction. Examples include salt water (homogeneous) and oil and water (heterogeneous). https://cdn.kastatic.org/ka-youtube-converted/rDWfLHn8PDM.mp4/rDWfLHn8PDM.mp4 340 Nature of Matter : Elements, Compounds, and Mixtures https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:classifying-matter/xc370bc422b7f75fc:mixtures/e/understand-mixtures 2025-12-18T18:00:52.364814749Z Understand: mixtures Check your understanding of mixtures and pure substances in this set of free, standards-aligned practice questions. DFigenshu exercise https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:untitled-210/e/homogeneous-and-heterogeneous-mixtures 2026-04-07T22:59:30.107127435Z Types of mixtures: Homogeneous and Heterogeneous mixtures LO1: Differences between pure and impure substances.  LO2: Differentiate between homogeneous and heterogeneous mixtures.   Revathi exercise https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:classifying-matter/xc370bc422b7f75fc:elements-and-atoms/v/elements 2025-01-16T17:32:17.772857468Z Elements Elements are the fundamental building blocks of all matter, just as letters form the basis of all writing. With only about 100 natural elements, nature constructs everything around us—from tiny microbes to vast oceans and stars. These elements, represented by symbols on the periodic table, combine in countless ways to create the diverse materials that make up the universe. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/7bad28ff-1c16-4904-860d-48ebd21ceb41_1280_720_base.png Elements Elements are the fundamental building blocks of all matter, just as letters form the basis of all writing. With only about 100 natural elements, nature constructs everything around us—from tiny microbes to vast oceans and stars. These elements, represented by symbols on the periodic table, combine in countless ways to create the diverse materials that make up the universe. https://cdn.kastatic.org/ka-youtube-converted/PeNjuIQFd9U.mp4/PeNjuIQFd9U.mp4 313 Nature of Matter : Elements, Compounds, and Mixtures https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:classifying-matter/xc370bc422b7f75fc:elements-and-atoms/v/atoms 2025-01-16T17:32:17.772857468Z Atoms An atom is the smallest particle of an element that still retains all the properties of that element. Early philosophers imagined atoms as indivisible units that make up all matter, an idea revived and developed by scientists like John Dalton. Atoms are incredibly small and numerous—a single gold ring contains more atoms than stars in the universe, highlighting their fundamental role in forming the matter we see. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/6f8dc03b-b8ae-49fe-b3c7-28487059ceae_1280_720_base.png Atoms An atom is the smallest particle of an element that still retains all the properties of that element. Early philosophers imagined atoms as indivisible units that make up all matter, an idea revived and developed by scientists like John Dalton. Atoms are incredibly small and numerous—a single gold ring contains more atoms than stars in the universe, highlighting their fundamental role in forming the matter we see. https://cdn.kastatic.org/ka-youtube-converted/KyBgxe-rU48.mp4/KyBgxe-rU48.mp4 248 Nature of Matter : Elements, Compounds, and Mixtures https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:atoms-and-molecules/x46dd29ce84a663ea:what-is-an-atom/e/understand-elements-and-atoms 2025-12-18T17:50:52.903549868Z Understand: elements and atoms Check your understanding of elements and atoms in this set of free, standards-aligned practice questions. Allen Ruch exercise https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:classifying-matter/xc370bc422b7f75fc:mixtures/v/properties-of-homogeneous-mixtures 2025-01-16T17:32:17.772857468Z Properties of homogeneous mixtures Homogeneous mixtures, also known as solutions, have components that are evenly distributed at the molecular level without chemical bonding. Examples include salt water, air, and alloys like steel. Solutions consist of a solute dissolved in a solvent, and their properties can vary with concentration. Mixtures can be separated using physical properties, such as boiling points or magnetism, unlike compounds that require chemical changes to be separated. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/34f67b27-294c-4a5e-8834-7104aea5ada4_1280_720_base.png Properties of homogeneous mixtures Homogeneous mixtures, also known as solutions, have components that are evenly distributed at the molecular level without chemical bonding. Examples include salt water, air, and alloys like steel. Solutions consist of a solute dissolved in a solvent, and their properties can vary with concentration. Mixtures can be separated using physical properties, such as boiling points or magnetism, unlike compounds that require chemical changes to be separated. https://cdn.kastatic.org/ka-youtube-converted/oilrxnwowTs.mp4/oilrxnwowTs.mp4 363 Nature of Matter : Elements, Compounds, and Mixtures https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:structure-of-nature-and-matter/x0c8b40bd4b242f0b:elements-compounds-and-symbols-of-elements/e/compounds-and-chemical-formulas 2026-04-08T00:16:02.937952483Z Compounds and Chemical formulas Lets answer some questions! Shankar R exercise