[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-208003-en":3,"doc-seo-208003-105":30,"detail-sidebar-cat-0-en-105":89},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},208003,1374402968488,"Đào","https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0",4,"Exam","Chemistry Knowledge Organiser - C1-Atomic structure","C1 atomic structure chemistry notes consolidate core ideas about elements, compounds, and mixtures, including how symbols, groups, and periods describe electron structure and properties. The material explains chemical reactions, balancing equations, and the conservation of mass, using examples such as hydrogen, oxygen, and water. It also defines key particles and atomic quantities, then details physical separation methods for impure substances: chromatography, distillation, and crystallisation.","| \u003Cbr>Chemistry Knowledge Organiser C1-Atomic structure\u003Cbr>Elements\u003Cbr>• An element contains only one typeof atom. All elements are given a symbol and are found on the periodic table. You need to learn the symbols for the first 20.\u003Cbr>• The Periodic Table is arranged into groups (columns) and periods (rows), as shown below.\u003Cbr>Elements in the same group have:\u003Cbr>• The same number of electrons in their outer shell\u003Cbr>• Similar properties\u003Cbr>Elements in the same period have:\u003Cbr>• The same number of electron shells\u003Cbr>Compounds\u003Cbr>• Compounds are 2 or more elements that are chemically bonded\u003Cbr>• These are made in chemical reactions.\u003Cbr>• Compounds are given a formula for example carbon dioxide is CO2 means1 carbon atom and 2 oxygen atoms.\u003Cbr>• Another example is calcium hydroxide Ca(OH)2 which means 1 calcium, 2 oxygen atoms and 2 hydrogen atoms\u003Cbr>\u003Cbr>Chemical Reactions\u003Cbr>• In some chemical reactions it may appear that there are less products than there were reactants; however this is often because a gas has been made and this has escaped into the atmosphere. | Key Terms Definitions Element A substance that contains only one type of atom Mixture A mixture is two or more different atoms which are not chemically bonded – can be separated Compound Two or more elements that are chemically bonded Group The columns on the Periodic Table Period The rows on the Periodic Table Reactant What you start with in a chemical reaction Product What is made in a chemical reaction\u003Cbr>The Conservation of Mass\u003Cbr>• In a chemical reaction, chemical bonds are broken the atoms are rearranged and the chemical bonds are madeagain.\u003Cbr>• In a chemical reaction, mass is never lost, you must start and finish with the same mass.\u003Cbr>\u003Cbr>Balancing Equations\u003Cbr>• We need to write balanced chemical equations represent chemical reactions and the conservation of mass.\u003Cbr>• For example: The equation below shows hydrogen and oxygen making water but there are more oxygen atoms on the right than the left.\u003Cbr>H₂ + O₂  H₂O\u003Cbr>• In the equation below there are 4 hydrogen atoms on the left\u003Cbr>and right of the equation and 2 oxygen atoms on each side 2H₂ + O₂  2H₂O |\n| --- | --- |\n\n\n| Chemistry Knowledge Organiser\u003Cbr>C1-Atomic structure |  |  |  |  |  | Key Terms | Definitions |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  |  | Pure | A substance made of only ONE type of element or compound |  |\n| Pure and Impure Substances\u003Cbr>• A pure substance contains only one type of element orcompound.\u003Cbr>• An impure substance contains more than one type of element or compoundin a mixture, for example salt water contains NaCl and H2O. All mixtures are impure substances.\u003Cbr>• Mixtures are much easier to separate than elements or compounds as they are not chemically bonded\u003Cbr>• There are a variety of ways that mixtures can be separated and they are outlined below. Remember that these are all physical changes and chemical bonds are not broken during any of these processes. |  |  |  |  |  | Impure | A mixture of elements and/or compounds |  |\n|  |  |  |  |  |  | Chromatography | A technique where mixtures can be separated based on their solubility. |  |\n|  |  |  |  |  |  | Distillation | A separation technique which means a mixture of two liquids is heated |  |\n|  |  |  |  |  |  | Crystallisation | Method of mixture separation where a solvent is evaporated, leaving the solute behind. |  |\n|  |  |  |  |  |  |  |  |  |\n| Separating Impure Substance |  |  |  |  |  |  |  |  |\n|  | Name | Diagram | Explanation |  |  |  |  |  |\n|  | Chromatography | | • Different substances travel different distances up the paper depending on their solubility in the solvent used (it is often water but not always) . The more soluble, the further it moves up the paper\u003Cbr>• Line must be drawn with pencil because pencil will not run.\u003Cbr>• Artificial colours in foods can be identified using chromatography. Additives do not necessarily have a colour and therefore are identified using che","cbCaievAP7iRRZc4","https://ap.wps.com/l/cbCaievAP7iRRZc4","pdf",961074,1,3,"English","en",105,"# Elements\n# Compounds\n# Chemical Reactions\n## Conservation of Mass\n## Balancing Equations\n# Separating Impure Substance\n## Chromatography\n## Distillation\n## Crystallisation\n# The Structure of the Atom\n## Subatomic Particles and Charges\n# Atomic Number and Mass Number\n# Key Terms","[{\"question\":\"How do elements, groups, and periods help describe electron structure?\",\"answer\":\"Elements are single types of atoms given symbols. The periodic table is arranged into groups (columns) and periods (rows): elements in the same group have the same number of electrons in their outer shell and similar properties, while elements in the same period have the same number of electron shells.\"},{\"question\":\"What does the conservation of mass mean in chemical reactions?\",\"answer\":\"In a chemical reaction, chemical bonds break and atoms rearrange, then new bonds form again. Mass is never lost, so the starting and finishing mass must be the same.\"},{\"question\":\"Why do we balance chemical equations?\",\"answer\":\"Balanced chemical equations represent chemical reactions while reflecting conservation of mass. The notes explain that examples can show the number of atoms (such as oxygen or hydrogen) must match on both sides, so equations are balanced accordingly.\"}]","Chemistry Knowledge Organiser - C1-Atomic structure | PDF",1788602059,8,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":84,"head_meta":86,"extra_data":88,"updated_unix":28},"chemistry-knowledge-organiser-c1-atomic-structure","",{"@graph":36,"@context":83},[37,52,66],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,50],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":21},"https://docshare.wps.com/document/exam/",{"item":51,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/chemistry-knowledge-organiser-c1-atomic-structure/208003/",{"url":51,"name":13,"@type":53,"author":54,"headline":13,"publisher":56,"fileFormat":59,"inLanguage":23,"description":14,"dateModified":60,"datePublished":60,"encodingFormat":59,"isAccessibleForFree":61,"interactionStatistic":62},"DigitalDocument",{"name":9,"@type":55},"Person",{"url":41,"name":57,"@type":58},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":63,"interactionType":64,"userInteractionCount":4},"InteractionCounter",{"@type":65},"ViewAction",{"@type":67,"mainEntity":68},"FAQPage",[69,75,79],{"name":70,"@type":71,"acceptedAnswer":72},"How do elements, groups, and periods help describe electron structure?","Question",{"text":73,"@type":74},"Elements are single types of atoms given symbols. The periodic table is arranged into groups (columns) and periods (rows): elements in the same group have the same number of electrons in their outer shell and similar properties, while elements in the same period have the same number of electron shells.","Answer",{"name":76,"@type":71,"acceptedAnswer":77},"What does the conservation of mass mean in chemical reactions?",{"text":78,"@type":74},"In a chemical reaction, chemical bonds break and atoms rearrange, then new bonds form again. Mass is never lost, so the starting and finishing mass must be the same.",{"name":80,"@type":71,"acceptedAnswer":81},"Why do we balance chemical equations?",{"text":82,"@type":74},"Balanced chemical equations represent chemical reactions while reflecting conservation of mass. The notes explain that examples can show the number of atoms (such as oxygen or hydrogen) must match on both sides, so equations are balanced accordingly.","https://schema.org",{"og:url":51,"og:type":85,"og:title":13,"og:site_name":57,"og:description":14},"article",{"robots":87,"canonical":51},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":90},[91,95,99,102,107,112,117,121,126,129,133],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":92,"show_sort_weight":93,"slug":94},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":96,"show_sort_weight":97,"slug":98},"Literature",80,"literature",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":100,"slug":101},70,"exam",{"id":103,"doc_module":4,"doc_module_name":46,"category_name":104,"show_sort_weight":105,"slug":106},5,"Comic",60,"comic",{"id":108,"doc_module":4,"doc_module_name":46,"category_name":109,"show_sort_weight":110,"slug":111},6,"Technology",50,"technology",{"id":113,"doc_module":4,"doc_module_name":46,"category_name":114,"show_sort_weight":115,"slug":116},7,"Healthcare",40,"healthcare",{"id":29,"doc_module":4,"doc_module_name":46,"category_name":118,"show_sort_weight":119,"slug":120},"Research & Report",30,"research-report",{"id":122,"doc_module":4,"doc_module_name":46,"category_name":123,"show_sort_weight":124,"slug":125},9,"Religion & Spirituality",20,"religion-spirituality",{"id":124,"doc_module":4,"doc_module_name":46,"category_name":127,"show_sort_weight":124,"slug":128},"World Cup","world-cup",{"id":130,"doc_module":4,"doc_module_name":46,"category_name":131,"show_sort_weight":130,"slug":132},10,"Lifestyle","lifestyle",{"id":134,"doc_module":4,"doc_module_name":46,"category_name":135,"show_sort_weight":103,"slug":136},19,"General","general"]