[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207973-en":3,"doc-seo-207973-105":30,"detail-sidebar-cat-0-en-105":91},{"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":20,"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},207973,1099523885336,"Taylor Morgan","https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c",4,"Exam","4.1 Atomic Structure and the Periodic Table - Revision Guide","Revision guide for 4.1 Atomic Structure and the Periodic Table, covering atoms, elements, and compounds, plus mixtures and practical separation methods. Explains that atoms are the smallest part of an element, represented by chemical symbols, and that elements are arranged into groups and periods in the periodic table. Describes how compounds form in fixed proportions and how mixtures can be separated using physical techniques such as distillation, filtration, and crystallisation.","Revision Guide: 4.1 Atomic Structure and the Periodic Table  \nAtoms, Elements and Compounds  \nAtoms  \nAll substances are made of atoms. An atom is the smallest part of an element that can exist.  \nAtoms of each element are represented by a chemical symbol, eg O represents an atom of oxygen, Na represents an atom of sodium.  \nElements and the periodic Table  \nAn element is a substance with only one type of atom. Elements are listed in the periodic table. There are about 100 different elements.  \nElements can be classified as metal or non-metal depending on their properties.  \nThe columns in the periodic table are called groups and contain similar elements.  \nThe rows in the periodic table are called periods . Elements show a gradual change in properties across a period  \nCompounds  \nSome elements combine through chemical reactions to form compounds.  \nCompounds are made from two or more different elements (types of atoms) combined together in fixed proportions and can be represented by formulae using the symbols of the atoms from which they were formed, e.g CO2  \nCompounds have different properties from the elements they are made from.  \nCompounds can only be separated into elements by chemical reactions.  \nMixtures  \nA mixture consists of two or more elements or compounds not chemically combined together.  \nThe chemical properties of each substance in the mixture are unchanged.  \nSeparating Techniques  \nMixtures can be separated by physical processes such as filtration, crystallisation, simple distillation, fractional distillation and chromatography. These physical processes do not involve chemical reactions.  \nSimple Distillation  \nType of mixture separated:  \nsoluble solid dissolved in a liquid (usually water) e.g. salty water  \nexplanation:  \nliquid boils off and condenses in the condenser. The thermometer will read the boiling point of the pure liquid.  \nthermometer  \nLeibig condenser  \nWater out  \nRound bottomed flask  \nWater in  \nCrystallisation/ Evaporation  \nEvaporating basin  \nType of mixture separated: A soluble solid and a liquid (E.g. salt and water)  \nTo separate a soluble solid from a (nonflammable) liquid we use evaporation. If we want to create hydrated salt crystals then do not evaporate all the water from the mixture  \nThe evaporating basin is wide and shallow, which gives the liquid a large surface area for quicker evaporation  \n[N Goalby chemrevise.org](N Goalby chemrevise.org) 1  \nFractional Distillation  \nFractionating column  \nLiebig condenser  \nType of mixture separated:  \nSoluble liquids with different boiling points e.g. crude oil  \nThe fractionating column has a temperature gradient and is hotter at the bottom than at the top  \nExplanation: When a mixture of soluble liquids is heated all liquids are evaporated. The liquid with the lower boiling point, however, forms the greatest percentage of vapour. As the vapour moves up the fractionating column it becomes more rich with the component that has the lowest boiling point. This is due to the vapour mixture condensing and evaporating as it moves up the column.  \nA thermometer measures the temperature of the fractions before they condense. The liquid with the lowest boiling point will be the first 'fraction' to collect.  \nFiltration  \nresidue  \nFilter paper  \nFilter funnel  \nfiltrate  \nType of mixture separated:  \ninsoluble solid suspended in a liquid (usually water) e.g. sand and water.  \nExplanation:  \nThe insoluble solid (called residue) gets caught in the filter paper, because the particles are too big to fit through the holes in the paper.  \nThe filtrate is the substance that comes through the filter paper.  \nSee chapter 4.8 for information about chromatography  \n[N Goalby chemrevise.org](N Goalby chemrevise.org)  \n2  \nHistory of Development of the Atom  \nBefore the discovery of the electron atoms were thought to be tiny spheres that could not be divided  \nPlum-pudding model  \nThe discovery of the electron led to the plum-pudding model of the atom. ","cbCaisIGygWdTOeS","https://ap.wps.com/l/cbCaisIGygWdTOeS","pdf",173850,1,7,"English","en",105,"# Atoms, Elements and Compounds\n## Atoms\n## Elements and the periodic table\n## Compounds\n## Mixtures\n# Separating Techniques\n## Simple distillation\n## Crystallisation/evaporation\n## Fractional distillation\n## Filtration\n# History of Development of the Atom\n## Plum-pudding model\n## Nuclear model (Rutherford and Marsden)\n## Bohr model\n## Chadwick and neutrons\n# The Atom","[{\"question\":\"What is an atom, and how is it represented for different elements?\",\"answer\":\"An atom is the smallest part of an element that can exist. Atoms of each element are represented by a chemical symbol, such as O for oxygen and Na for sodium.\"},{\"question\":\"How do elements and the periodic table relate to groups and periods?\",\"answer\":\"An element contains only one type of atom and is listed in the periodic table. Columns are called groups with similar elements, while rows are called periods showing a gradual change in properties across the period.\"},{\"question\":\"How can mixtures be separated, and what is the difference between physical and chemical separation?\",\"answer\":\"Mixtures are separated using physical processes such as filtration, crystallisation, simple distillation, fractional distillation, and chromatography. These do not involve chemical reactions, unlike separating compounds into elements which requires chemical reactions.\"}]","4.1 Atomic Structure and the Periodic Table - Revision Guide | PDF",1788601953,18,{"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":86,"head_meta":88,"extra_data":90,"updated_unix":28},"41-atomic-structure-and-the-periodic-table-revision-guide","",{"@graph":36,"@context":85},[37,53,68],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"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":50},"https://docshare.wps.com/document/exam/",3,{"item":52,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/41-atomic-structure-and-the-periodic-table-revision-guide/207973/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-06","2026-09-05",true,{"@type":65,"interactionType":66,"userInteractionCount":20},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"What is an atom, and how is it represented for different elements?","Question",{"text":75,"@type":76},"An atom is the smallest part of an element that can exist. Atoms of each element are represented by a chemical symbol, such as O for oxygen and Na for sodium.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"How do elements and the periodic table relate to groups and periods?",{"text":80,"@type":76},"An element contains only one type of atom and is listed in the periodic table. Columns are called groups with similar elements, while rows are called periods showing a gradual change in properties across the period.",{"name":82,"@type":73,"acceptedAnswer":83},"How can mixtures be separated, and what is the difference between physical and chemical separation?",{"text":84,"@type":76},"Mixtures are separated using physical processes such as filtration, crystallisation, simple distillation, fractional distillation, and chromatography. 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