[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-491480-105":59,"doc-detail-491480-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","year-8-chemistry-unit-5-atomic-structure","Year 8 Chemistry Unit 5 - Atomic structure","","Year 8 Chemistry Unit 5 explains atomic structure by distinguishing elements, mixtures and compounds, then describing atoms as tiny particles with a central nucleus and surrounding electrons. It defines protons, neutrons and electrons with their charges, and shows how atomic number and atomic mass determine the counts of subatomic particles. 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A mixture is made from substances that are not chemically joined. A compound forms when atoms of different elements join by chemical bonds.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How do you calculate neutrons using atomic number and atomic mass?",{"text":117,"@type":113},"Subtract the atomic number from the mass number: neutrons = mass number − atomic number.",{"name":119,"@type":110,"acceptedAnswer":120},"What are isotopes and how are they different from other atoms of the same element?",{"text":121,"@type":113},"Isotopes are atoms of an element with the same number of protons but different numbers of neutrons, giving different atomic masses.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},491480,1791094752,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":56,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145,"preview_page_count":4},962090760608,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Year 8 Chemistry Unit 5  \nClass:  \nName:  \nAtomic structure  \nL1: Elements, Mixtures and Compounds  \nAtoms and molecules  \nRemember that an element is one type of atom, like carbon, gold or chlorine. We will look at three ways that atoms can exist.  \n1. Single atoms  \nThe atoms of some elements do not join up with other atoms. They stay as single atoms. The element helium is like this. Helium atoms do not join up with eachother or any other element and it is a gas.  \nHelium atom  \n2. Molecules of elements  \nWhen atoms of the same element join together we get a molecule of that element.  \n3. Compounds  \nA compound is made when atoms of different elements join together by chemical bonds. This means that compounds will always exist as molecules, not separate atoms. The diagrams show some molecules of common compounds.  \nWhat is a mixture?  \nA mixture is made from different substances that are not chemically joined.  \nIn summary:  \nTest yourself  \nTask: Write the correct letters below.  \n1. 1 type of element:    \n2. 1 type of compound:    \n3. Mixture of elements:    \n4. Mixture of compounds:    \n5. Mixture of elements and compounds:    \nChallenge:  \n1. Which letter is showing molecules of elements?  \n2. Which letters are showing gases?  \n3. Which letter is showing a solid?  \n4. Which letter could be showing water (H2O)  \n4  \nL2 & L3: Structure of the atom, atomic mass and  \natomic number  \nAtomic structure  \nAll substances are made from tiny particles called atoms. An atom has a small central nucleus made up of smaller sub-atomic particles called protons and neutrons. The nucleus is surrounded by even smaller sub-atomic particles called electrons  \nProtons and electrons have an electrical charge. Protons are positive, electrons are negative. Neutrons are neutral.  \nThe number of electrons in an atom is equal to the number of protons in its nucleus. This means atoms have no overall electrical charge.  \nAtomic number and atomic mass  \nThe atomic number of an atom is the number of protons it contains.  \nThe atoms of different elements have different numbers of protons. For example, all oxygen atoms have 8 protons and all sodium atoms have 11 protons.  \nThe atomic mass (or mass number) of an atom is the total number of protons and neutrons it contains.  \nChallenge: Calculating the number of subatomic particles in each atom using the atomic number and the atomic mass.  \nThe symbol on the right tells you that chlorine has 17 protons. This is because the atomic number is 17.  \nIn an atom, the number of protons is equal to the number of electrons, so chlorine contains 17 electrons.  \nTo work out the number of neutrons, you subtract (take away) the atomic number from the mass number.  \n35 – 17 = 18  \nSo, chlorine has 18 neutrons!  \nAtomic mass  \nAtomic  \nnumber  \nTest yourself  \nTask 1: Look 􀃆 Cover 􀃆 Write 􀃆 Check  \n\n| Information | 1st try | 2nd try |\n| --- | --- | --- |\n| The atomic number is the number of protons an atom contains. | The atomic number is the number of   |  |\n| The atomic mass is the total number of protons and neutrons an atom contains. | The atomic mass is the total number of   |  |\n| In an atom, the number of protons is the same asthe number of electrons | In an atom   |  |\n\nTask 2: Label the protons, neutrons and electrons in the diagram below.  \nTask 3: Complete the table below.  \nChallenge: Sodium has an atomic number of 11 and a mass number of 23.  \n1. How many protons does it have?  \n2. How many electrons does it have?  \n3. How many neutrons does it have?  \n6  \nL4: Calculating the number of each subatomic particle and learning about isotopes  \nCalculating the number of subatomic particles  \nThe symbol on the right tells you that iron has 26 protons. This is because the atomic number is 26.  \nIn an atom, the number of protons is equal to the number of electrons, so iron contains 26 electrons.  \nTo work out the number of neutrons, you subtract (take away) the atomic number from the mass number.  \n56 – 26 = 30  \nSo,","cbCait8x5c0ZGQc9","https://ap.wps.com/l/cbCait8x5c0ZGQc9","pdf",2937453,48,"English","# Atomic structure\n## Elements, mixtures and compounds\n## Structure of the atom, atomic mass and atomic number\n## Calculating the number of each subatomic particle and learning about isotopes","[{\"question\":\"What is the difference between an element, a mixture, and a compound?\",\"answer\":\"An element is one type of atom. A mixture is made from substances that are not chemically joined. A compound forms when atoms of different elements join by chemical bonds.\"},{\"question\":\"How do you calculate neutrons using atomic number and atomic mass?\",\"answer\":\"Subtract the atomic number from the mass number: neutrons = mass number − atomic number.\"},{\"question\":\"What are isotopes and how are they different from other atoms of the same element?\",\"answer\":\"Isotopes are atoms of an element with the same number of protons but different numbers of neutrons, giving different atomic masses.\"}]","Year 8 Chemistry Unit 5 - Atomic structure | PDF",1790849963,121]