[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-665571-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-665571-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","photoelectron-spectroscopy-in-ap-chemistry","Photoelectron Spectroscopy in AP Chemistry","","Photoelectron spectroscopy (PES) is newly added to the AP Chemistry curriculum for 2013-14 under Big Idea 1 to connect atomic structure with measurable electron properties. PES determines electron binding energy by using high-energy X-ray or UV light to eject electrons and measuring the kinetic energy. Binding energies are plotted to form a photoelectron spectrum, where peak positions and heights reflect subshell identity, relative electron counts, and effective nuclear charge. Sample neon spectra and interpretation rules guide students to analyze binding energy and electron configuration relationships, including quantum mechanical sub-shell evidence.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/exam/","Exam",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/photoelectron-spectroscopy-in-ap-chemistry/665571/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/photoelectron-spectroscopy-in-ap-chemistry/665571.png","ImageObject",300,407,{"name":42,"@type":43},"DoDO","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-30","2026-10-29",true,{"@type":52,"interactionType":53,"userInteractionCount":30},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What is photoelectron spectroscopy (PES) used to measure?","Question",{"text":62,"@type":63},"PES determines the binding energy of electrons in an atom or molecule, including core-shell electrons, by comparing incident photon energy with measured electron kinetic energy.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How is binding energy obtained from PES measurements?",{"text":67,"@type":63},"High-energy incident light ejects electrons, and the kinetic energy of the ejected electrons is measured. Binding energy is given by hv - KE, where hv is the photon energy.",{"name":69,"@type":60,"acceptedAnswer":70},"What do peaks and peak heights mean in a PES spectrum?",{"text":71,"@type":63},"All electrons in the same subshell have the same binding energy, creating one peak per electron “kind.” Peak height corresponds to the relative number of electrons in that shell, and trends with effective nuclear charge shift binding energy.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},665571,1793304996,{"code":4,"msg":81,"data":82},"success",[83,87,91,94,99,104,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":92,"slug":93},70,"exam",{"id":95,"doc_module":4,"doc_module_name":25,"category_name":96,"show_sort_weight":97,"slug":98},5,"Comic",60,"comic",{"id":100,"doc_module":4,"doc_module_name":25,"category_name":101,"show_sort_weight":102,"slug":103},6,"Technology",50,"technology",{"id":105,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},7,"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":95,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":33,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":30,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":33,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":79,"read_time":123},962093270745,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Photoelectron Spectroscopy in AP Chemistry  \nPhotoelectron spectroscopy, commonly abbreviated as PES, is newly added to the AP Chemistry curriculum for 2013-­‐14 . It appears under Big Idea 1 in relation to the structure of the atom.  \nBackground Information 1  \nPES is a technique to determine the binding energy of electrons in an atom or molecule, including those electrons located in core shells.  \ne  \nejected electron w/ kinetic energy KE  \nBinding Energy = hv-KE  \nHigh-­‐energy incident light (X-­‐ray or UV) is used to eject a single electron from an atom.2 The kinetic energy of the ejected electron is measured. The difference between the energy of the incident light and the kinetic energy of the ejected electron gives the binding energy of that electron.  \nIn a sample being tested, many atoms are being hit with incident light, and thus many electrons are ejected. These electrons will originate from all occupied orbitals of the atom. The binding energy for all of the detected electrons are complied into a photoelectron spectrum, where the number of ejected electrons at each binding energy is plotted. By convention, binding energy is plotted on the horizontal axis in eV or MJ, with energy DECREASING from left to right (see example on page 2) .  \nPrinciples used to Interpret PES Spectra:  \n-­‐ all electrons in the same subshell have the same binding energy (they are the same “kind”)  \n-­‐ there is one peak for every different “kind” of electron  \n-­‐ peak height corresponds to the relative number of electrons in each shell of an atom  \n-­‐ as effective nuclear charge increases, the binding energy will increase  \n-­‐ binding energies of an electron will differ for an atom vs. the same atom in a molecule  \n1 information and diagram taken from Chemistry: Structure & Dynamics 5th Edition, pg. 89  \n2 only first ionization binding energies are measured  \nJennifer K. Howell & Jennifer Pitt-­‐Lainsbury for www.[APchemresources2014.weebly.com](APchemresources2014.weebly.com), 2013 page 1 of 4  \nExample: The following 3 questions refer to the photoelectron spectrum of neon as shown below:  \nPhotoelectron Spectrum of Neon  \nRe lat ive Number of E lectrons  \n\n| [www.APchemresources2014. weebly.com](www.APchemresources2014. weebly.com)\u003Cbr>J. K. Howell\u003Cbr>A | B\u003Cbr>C\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>|\n| --- | --- |\n|  |  |\n\n1000 800 600 400 200 0  \nBinding Energy (eV)  \n1. Peaks A, B, and C represent the binding energies of electrons in which subshells of neon?  \na. 1s, 2s, 2p c. 1s, 1s, 1s  \nb. 2p, 2s, 1s d. 2s, 2p, 2p  \n2. Which of the following statements best accounts for peak A being far to the left of peaks B and C:  \na. the electron configuration of neon is 1s22s22p4  \nb. neon has 8 electrons located in its valence shell  \nc. core electrons of an atom experience a much higher effective nuclear charge than valence electrons  \nd. peaks B and C show first ionization energies of electrons in neon, whereas peak A shows the second ionization energy of neon electrons  \n3. Which of the following statements best accounts for peak C being three times the height of peak B:  \na. the intensity of the photoelectron signal at a given energy is a measure of the number of electrons in that energy level  \nb. electrons represented by peak B have approximately triple the binding energy than those represented by peak C  \n[c. in](c. in) a photoelectron spectrum, as binding energy increases the relative number of electrons decreases  \nd. the height of peaks in a photoelectron spectrum does not have any relation to the structure of an atom  \nInterpretation of Spectrum:  \nThe photoelectron spectrum of neon shows that the electrons in the 1s subshell (peak A) have a much higher binding energy (870 eV) than the electrons is the 2s subshell (peak B: 49 eV) and 2p subshell (peak C: 22 eV) . Additionally, the 2p signal (peak C) is three times the height of the 1s and 2s signals (peak B), indicating that it contains triple the number of electrons (2p6 vs. 1s2 / 2s2 ).  \nAnswers","cbCaiskwyRqQvshQ","https://ap.wps.com/l/cbCaiskwyRqQvshQ","pdf",412978,"English","# Photoelectron Spectroscopy in AP Chemistry\n## Background and principles\n## Interpreting PES spectra (neon example)\n## PES and the quantum mechanical model\n## How PES is incorporated into AP Chemistry","[{\"question\":\"What is photoelectron spectroscopy (PES) used to measure?\",\"answer\":\"PES determines the binding energy of electrons in an atom or molecule, including core-shell electrons, by comparing incident photon energy with measured electron kinetic energy.\"},{\"question\":\"How is binding energy obtained from PES measurements?\",\"answer\":\"High-energy incident light ejects electrons, and the kinetic energy of the ejected electrons is measured. Binding energy is given by hv - KE, where hv is the photon energy.\"},{\"question\":\"What do peaks and peak heights mean in a PES spectrum?\",\"answer\":\"All electrons in the same subshell have the same binding energy, creating one peak per electron “kind.” Peak height corresponds to the relative number of electrons in that shell, and trends with effective nuclear charge shift binding energy.\"}]","Photoelectron Spectroscopy in AP Chemistry | PDF"]