{"id":727741,"date":"2024-07-31T13:06:43","date_gmt":"2024-07-31T07:36:43","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=727741"},"modified":"2025-05-08T17:16:44","modified_gmt":"2025-05-08T11:46:44","slug":"mass-of-proton","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/","title":{"rendered":"Mass of Proton"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#What_is_Proton\" title=\"What is Proton?\">What is Proton?<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#Mass_of_Proton_Definition\" title=\"Mass of Proton Definition\">Mass of Proton Definition<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#Mass_of_Proton_Units\" title=\"Mass of Proton Units\">Mass of Proton Units<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#Who_Discovered_Proton\" title=\"Who Discovered Proton\">Who Discovered Proton<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#Properties_of_Protons\" title=\"Properties of Protons\">Properties of Protons<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#FAQs_on_Mass_of_Proton\" title=\"FAQs on Mass of Proton\">FAQs on Mass of Proton<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#What_is_the_mass_of_protons\" title=\"What is the mass of protons?\">What is the mass of protons?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#What_is_the_mass_of_an_electron_and_a_proton\" title=\"What is the mass of an electron and a proton?\">What is the mass of an electron and a proton?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#What_is_the_mass_of_the_electron\" title=\"What is the mass of the electron?\">What is the mass of the electron?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#What_is_the_mass_of_a_neutron\" title=\"What is the mass of a neutron?\">What is the mass of a neutron?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#Who_discovered_the_proton\" title=\"Who discovered the proton?\">Who discovered the proton?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#Who_discovered_electron_proton_and_neutron\" title=\"Who discovered electron, proton, and neutron?\">Who discovered electron, proton, and neutron?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#Who_discovered_the_proton_Rutherford_or_Goldstein\" title=\"Who discovered the proton: Rutherford or Goldstein?\">Who discovered the proton: Rutherford or Goldstein?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/infinitylearn.com\/surge\/science\/mass-of-proton\/#Who_discovered_the_neutron\" title=\"Who discovered the neutron?\">Who discovered the neutron?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>The proton is a subatomic particle with a positive charge and a mass of approximately 1.6726 \u00d7 10\u207b\u00b2\u2077 kg. It is one of the fundamental building blocks of atomic nuclei, along with the neutron. The discovery of canal rays, which carry a positive charge, came from experiments with modified cathode ray tubes. These rays behaved oppositely to electrons. The smallest and lightest positive ion, called a proton, was derived from <strong>hydrogen<\/strong>. The proton was further characterized in 1919, detailing its unique properties, including its positive charge and mass.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_is_Proton\"><\/span>What is Proton?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Protons are positively charged particles located in the nucleus of an atom. An atom is made up of protons, electrons, and neutrons, with its entire mass concentrated in the central nucleus. The nucleus, which houses both protons and <strong>neutrons<\/strong> (collectively known as nucleons), is surrounded by<strong> electrons<\/strong> that revolve around it in circular orbits.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mass_of_Proton_Definition\"><\/span>Mass of Proton Definition<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The mass of a proton is the measure of the amount of matter contained in a <strong>proton<\/strong>, a positively charged particle found in the nucleus of an atom. The mass of a proton is <strong>1.6726 \u00d7 10<sup>\u221227<\/sup> <\/strong>kg or 1.007276 atomic mass units (amu). This mass is slightly less than that of a neutron, making protons one of the two types of nucleons that contribute to the atomic mass of elements. The mass of a proton plays a crucial role in the calculations of atomic mass and is fundamental to the study of atomic structure and particle physics.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-727749\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2024\/07\/Mass-of-Proton.jpg\" alt=\"Mass of Proton\" width=\"996\" height=\"797\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2024\/07\/Mass-of-Proton.jpg 996w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2024\/07\/Mass-of-Proton-300x240.jpg 300w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2024\/07\/Mass-of-Proton-768x615.jpg 768w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2024\/07\/Mass-of-Proton-150x120.jpg 150w\" sizes=\"(max-width: 996px) 100vw, 996px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mass_of_Proton_Units\"><\/span>Mass of Proton Units<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"table-responsive\">\n<table class=\"table table-bordered table-striped\" cellspacing=\"0\" cellpadding=\"5\">\n<tbody>\n<tr style=\"background-color: #89cff0; color: black;\">\n<td><strong>Unit<\/strong><\/td>\n<td><strong>Value<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Mass of proton in kilograms<\/td>\n<td>mp=1.6726\u00d710<sup>\u221227<\/sup>kg<\/td>\n<\/tr>\n<tr>\n<td>iMass of proton in grams<\/td>\n<td>mp=1.6726\u00d710<sup>\u221224<\/sup>g<\/td>\n<\/tr>\n<tr>\n<td>Mass of proton in Atomic mass unit<\/td>\n<td>1.00727 amu<\/td>\n<\/tr>\n<tr>\n<td>Mass of proton in MeV<\/td>\n<td>938.2720813(58) MeV\/c<sup>2<\/sup><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"Who_Discovered_Proton\"><\/span>Who Discovered Proton<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The discovery of the proton is a remarkable tale of scientific inquiry that has fundamentally transformed our comprehension of the atom and the universe. It began in 1886 with the work of German physicist Eugen Goldstein, who observed positively charged rays in a gas discharge tube. He named these rays &#8220;canal rays,&#8221; and they were later identified as being composed of protons.<\/p>\n<p>Further advancements were made in 1909 by British physicist Ernest Rutherford through his groundbreaking gold foil experiment. Rutherford&#8217;s experiments revealed that the atom&#8217;s nucleus was significantly smaller and denser than previously thought. He noticed that some alpha particles fired at the gold foil were deflected at large angles, indicating the presence of a positively charged particle within the <strong>nucleus<\/strong>. This particle was subsequently identified as the proton, solidifying its place in atomic theory and expanding our understanding of atomic structure.<\/p>\n<p>The particle in the positive rays in the discharge tube was named a proton. A proton is produced when an electron is removed from a hydrogen atom.<\/p>\n<p><strong>H (hydrogen atom) \u2192 H<sup>+<\/sup> (proton) + e<sup>\u2013<\/sup> (electron) <\/strong><\/p>\n<p>Thus, it can be said that a proton is a hydrogen ion (H<sup>+<\/sup>).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Properties_of_Protons\"><\/span>Properties of Protons<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Mass<\/strong>: The mass of a proton is approximately 1.672\u00d710<sup>\u221224<\/sup>grams or 1.0078 atomic mass units (u).<\/li>\n<li><strong>Charge<\/strong>: A proton carries an electrical charge of 1.6022\u00d710<sup>\u221219<\/sup> coulombs (C), which is equal in magnitude but opposite in sign to the charge of an electron.<\/li>\n<li><strong>Fundamental Nature<\/strong>: The proton is a fundamental particle with a unit mass and a positive unit charge.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"FAQs_on_Mass_of_Proton\"><\/span>FAQs on Mass of Proton<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"What_is_the_mass_of_protons\"><\/span>What is the mass of protons?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe mass of a proton is 1.672\u00d710\u221227 kilograms.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"What_is_the_mass_of_an_electron_and_a_proton\"><\/span>What is the mass of an electron and a proton?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe mass of an electron is 9.109 \u00d7 10\u221231 kilograms, while the mass of a proton is about 1.672 \u00d7 10\u221227 kilograms .\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"What_is_the_mass_of_the_electron\"><\/span>What is the mass of the electron?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe mass of an electron is 9.109 \u00d7 10\u221231 kilograms.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"What_is_the_mass_of_a_neutron\"><\/span>What is the mass of a neutron?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe mass of a neutron is approximately 1.675 \u00d7 10\u221227 kilograms .\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Who_discovered_the_proton\"><\/span>Who discovered the proton?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe proton was discovered by Ernest Rutherford in 1917 .\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Who_discovered_electron_proton_and_neutron\"><\/span>Who discovered electron, proton, and neutron?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe electron was discovered by J.J. Thomson in 1897, the proton by Ernest Rutherford in 1917, and the neutron by James Chadwick in 1932.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Who_discovered_the_proton_Rutherford_or_Goldstein\"><\/span>Who discovered the proton: Rutherford or Goldstein?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe proton was identified and named by Ernest Rutherford, although Eugen Goldstein had earlier observed positive rays which later were understood to be protons .\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Who_discovered_the_neutron\"><\/span>Who discovered the neutron?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe neutron was discovered by James Chadwick in 1932 .\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\n<script type=\"application\/ld+json\">\n\t{\n\t\t\"@context\": \"https:\/\/schema.org\",\n\t\t\"@type\": \"FAQPage\",\n\t\t\"mainEntity\": [\n\t\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"What is the mass of protons?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The mass of a proton is 1.672\u00d710\u221227 kilograms.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"What is the mass of an electron and a proton?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The mass of an electron is 9.109 \u00d7 10\u221231 kilograms, while the mass of a proton is about 1.672 \u00d7 10\u221227 kilograms .\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"What is the mass of the electron?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The mass of an electron is 9.109 \u00d7 10\u221231 kilograms.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"What is the mass of a neutron?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The mass of a neutron is approximately 1.675 \u00d7 10\u221227 kilograms .\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Who discovered the proton?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The proton was discovered by Ernest Rutherford in 1917 .\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Who discovered electron, proton, and neutron?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The electron was discovered by J.J. Thomson in 1897, the proton by Ernest Rutherford in 1917, and the neutron by James Chadwick in 1932.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Who discovered the proton: Rutherford or Goldstein?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The proton was identified and named by Ernest Rutherford, although Eugen Goldstein had earlier observed positive rays which later were understood to be protons .\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Who discovered the neutron?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The neutron was discovered by James Chadwick in 1932 .\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t\t\t\t]\n\t}\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>The proton is a subatomic particle with a positive charge and a mass of approximately 1.6726 \u00d7 10\u207b\u00b2\u2077 kg. It [&hellip;]<\/p>\n","protected":false},"author":52,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Mass of Proton","_yoast_wpseo_title":"Mass of Proton - Definition, Charge, Discovery, Properties","_yoast_wpseo_metadesc":"The mass of a proton is approximately 1.672 \u00d710 \u221227 kilograms. It carries a positive charge of +1.602 \u00d7 10 \u221219 coulombs. Discovered by Ernest Rutherford in 1917, protons are fundamental particles in atomic nuclei. They are essential for defining the atomic number and thus the identity of elements. Explore more about the definition, charge, discovery, and properties of protons in our detailed guide.","custom_permalink":"science\/mass-of-proton\/"},"categories":[116],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mass of Proton - Definition, Charge, Discovery, Properties<\/title>\n<meta name=\"description\" content=\"The mass of a proton is approximately 1.672 \u00d710 \u221227 kilograms. It carries a positive charge of +1.602 \u00d7 10 \u221219 coulombs. Discovered by Ernest Rutherford in 1917, protons are fundamental particles in atomic nuclei. They are essential for defining the atomic number and thus the identity of elements. 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