https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:intermolecular-forces-and-properties/x2eef969c74e0d802:solids-liquids-and-gases/v/representing-solids-liquids-and-gases-using-particulate-models 2022-10-05T02:43:18.611402953Z Representing solids, liquids, and gases using particulate models In this video, we'll learn how to represent solids, liquids, and gases using particulate models. The particles in a solid are either highly ordered (if the solid is crystalline) or have no regular arrangement (if the solid is amorphous). In both cases, the motion of the particles is limited. The particles in a liquid are close together and are constantly moving and colliding. Finally, the particles in a gas are generally well-separated and are in constant, random motion. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/4afb6fa0-d848-4ae6-8e3f-41ea2c33569a_1280_720_base.png Representing solids, liquids, and gases using particulate models In this video, we'll learn how to represent solids, liquids, and gases using particulate models. The particles in a solid are either highly ordered (if the solid is crystalline) or have no regular arrangement (if the solid is amorphous). In both cases, the motion of the particles is limited. The particles in a liquid are close together and are constantly moving and colliding. Finally, the particles in a gas are generally well-separated and are in constant, random motion. https://cdn.kastatic.org/ka-youtube-converted/4Q45iIeMdCM.mp4/4Q45iIeMdCM.mp4 291 Particle theory and states of matter https://www.khanacademy.org/science/ms-chemistry/xc370bc422b7f75fc:physical-properties-of-matter/xc370bc422b7f75fc:states-of-matter-and-phase-changes/v/states-of-matter-ms 2025-02-13T17:59:34.347326855Z States of matter Matter exists in three main states: solids, liquids, and gases, each with unique particle arrangements and behaviors. Particles range from being tightly packed, with a definite shape and volume, to moving freely, with no fixed shape or volume. Understanding these states of matter helps us see why solids are rigid, liquids flow, and gases expand to fill spaces. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/cb816a21-25af-4ceb-9bcd-1a5bf80fc572_1280_720_base.png States of matter Matter exists in three main states: solids, liquids, and gases, each with unique particle arrangements and behaviors. Particles range from being tightly packed, with a definite shape and volume, to moving freely, with no fixed shape or volume. Understanding these states of matter helps us see why solids are rigid, liquids flow, and gases expand to fill spaces. https://cdn.kastatic.org/ka-youtube-converted/gBiF-OLUVTY.mp4/gBiF-OLUVTY.mp4 269 Particle theory and states of matter https://www.khanacademy.org/science/chemistry/states-of-matter-and-intermolecular-forces/states-of-matter/v/states-of-matter 2021-01-04T18:35:18Z States of matter Introduction to the states or phases of matter. Sal Khan video https://cdn.kastatic.org/googleusercontent/YJaya_goqyR9J2aMbNKVoorixkEPY67v6-XaZz_c82fZLwsShc2l8YSU2uyQyAyF44DHziJ1uPGfrgTy04dA_7s States of matter Introduction to the states or phases of matter. https://cdn.kastatic.org/ka-youtube-converted/pKvo0XWZtjo.mp4/pKvo0XWZtjo.mp4 1164 Particle theory and states of matter https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:matter-as-particles/x19bc096754f0b9af:particle-theory-and-states-of-matter/v/states-of-matter-part-1-ur 2025-08-07T23:35:51.501752344Z States of matter - Part 1 Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw States of matter - Part 1 Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/uegE7CNnsBI.mp4/uegE7CNnsBI.mp4 404 Particle theory and states of matter https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:matter-as-particles/x19bc096754f0b9af:particle-theory-and-states-of-matter/v/states-of-matter-part-2-ur 2025-08-07T23:35:51.501752344Z States of matter - Part 2 Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw States of matter - Part 2 Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/aTZLR640ugA.mp4/aTZLR640ugA.mp4 332 Particle theory and states of matter https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:matter-as-particles/x19bc096754f0b9af:particle-theory-and-states-of-matter/v/digging-deeper-into-gases-ur 2025-08-07T23:35:51.501752344Z Digging Deeper into Gases Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Digging Deeper into Gases Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/EGZPnk37dmk.mp4/EGZPnk37dmk.mp4 336 Particle theory and states of matter https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:matter-as-particles/x19bc096754f0b9af:particle-theory-and-states-of-matter/v/activity-thermal-expansion-in-gases-ur 2025-08-07T18:49:36.591279888Z Activity: Thermal expansion in gases Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Activity: Thermal expansion in gases Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/ZAt3ugRB1Zo.mp4/ZAt3ugRB1Zo.mp4 40 Particle theory and states of matter https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:matter-as-particles/x19bc096754f0b9af:particle-theory-and-states-of-matter/v/explanation-thermal-expansion-in-gases-ur 2025-08-07T18:49:36.591279888Z Explanation: Thermal expansion in gases Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Explanation: Thermal expansion in gases Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/mJZGM12QwsQ.mp4/mJZGM12QwsQ.mp4 52 Particle theory and states of matter https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:matter-as-particles/x19bc096754f0b9af:particle-theory-and-states-of-matter/v/characteristics-of-particles-of-matter-ur 2025-08-07T23:35:51.501752344Z Characteristics of particles of matter Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Characteristics of particles of matter Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/N56mq4it4JI.mp4/N56mq4it4JI.mp4 328 Particle theory and states of matter https://www.khanacademy.org/science/bridge-course-class-11th-chemistry/x426c9d2c554669cb:states-of-matter/x426c9d2c554669cb:properties-of-matter/e/characteristics-of-particles-of-matter 2026-04-03T18:30:01.793877038Z Characteristics of particles of matter Let's solve some questions! Vibhor Pandey exercise https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:structure-of-nature-and-matter/x0c8b40bd4b242f0b:states-of-matter/e/states-of-matter 2026-04-07T23:55:07.30621384Z States of matter Lets answer some questions on states of matter Shankar R exercise https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:structure-of-nature-and-matter/x0c8b40bd4b242f0b:states-of-matter/e/solid-liquid-and-gas 2026-04-07T22:23:57.656416987Z Solid, liquid and gas Let's try to distinguish between a solid, liquid and gas Vibhor Pandey exercise https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:states-of-matter/x2613d8165d88df5e:gases/e/apply-properties-of-gases 2026-03-09T13:10:34.525395423Z Apply: properties of gases Apply your understanding of intermolecular forces to predict macroscopic properties in gases in this set of free practice questions. Donna Fig exercise https://www.khanacademy.org/science/grade-6-science-snc-aligned/x19bc096754f0b9af:matter-as-particles/x19bc096754f0b9af:particle-theory-and-states-of-matter/e/differentiate-between-solids-liquids-and-gases 2026-04-07T22:23:57.656416987Z Differentiate between solids, liquids and gases. Classification of things around us on the basis of physical properties into solids, liquids and gases. Revathi exercise