{"id":2651,"date":"2025-06-27T16:44:46","date_gmt":"2025-06-27T11:14:46","guid":{"rendered":"https:\/\/texpertssolutions.com\/notes\/?p=2651"},"modified":"2025-06-29T16:44:50","modified_gmt":"2025-06-29T11:14:50","slug":"protactinium-pa","status":"publish","type":"post","link":"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/protactinium-pa\/","title":{"rendered":"Protactinium (Pa)"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\ud83d\udd39 Basic Information<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Element Name<\/strong>: Protactinium<\/li>\n\n\n\n<li><strong>Discovered By<\/strong>: Kasimir Fajans and Oswald Helmuth G\u00f6hring<\/li>\n\n\n\n<li><strong>Year of Discovery<\/strong>: 1913 (confirmed and isolated in 1917)<\/li>\n\n\n\n<li><strong>Category<\/strong>: Actinide Series (Radioactive Metal)<\/li>\n\n\n\n<li><strong>Group<\/strong>: Actinides (no formal group number)<\/li>\n\n\n\n<li><strong>State at Room Temperature<\/strong>: Solid \ud83e\uddca<\/li>\n<\/ul>\n\n\n\n<p>Protactinium is a <strong>rare, silvery-gray metal<\/strong> that\u2019s <strong>radioactive<\/strong> and found in <strong>trace amounts in uranium ores<\/strong>. It\u2019s part of the <strong>actinide series<\/strong> on the periodic table.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd38 Chemical Properties<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chemical Symbol<\/strong>: Pa<\/li>\n\n\n\n<li><strong>Atomic Number<\/strong>: 91<\/li>\n\n\n\n<li><strong>Atomic Mass<\/strong>: ~231.04 u<\/li>\n\n\n\n<li><strong>Valency<\/strong>: Commonly +5<\/li>\n\n\n\n<li><strong>Electronic Configuration<\/strong>: [Rn] 5f\u00b2 6d\u00b9 7s\u00b2<\/li>\n<\/ul>\n\n\n\n<p>It behaves chemically like uranium and thorium and is known for forming <strong>complex compounds<\/strong> with oxygen and halogens.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcd8 Basic Things to Know<\/h2>\n\n\n\n<p>The name \u201c<strong>Protactinium<\/strong>\u201d means &#8220;<strong>parent of actinium<\/strong>&#8221; because it decays into actinium during its radioactive life cycle. It\u2019s extremely rare and difficult to isolate.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\udd14 Interesting Facts<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It\u2019s <strong>one of the rarest naturally occurring elements<\/strong> on Earth \ud83c\udf0d<\/li>\n\n\n\n<li>Protactinium is about <strong>1 million times more rare than gold<\/strong>! \ud83d\udcb0<\/li>\n\n\n\n<li>It was once called <strong>&#8220;brevium&#8221;<\/strong> because of its short-lived isotopes<\/li>\n\n\n\n<li>Very <strong>toxic and highly radioactive<\/strong> \u2622\ufe0f \u2014 requires special handling<\/li>\n\n\n\n<li>Used mostly in research, but once helped scientists <strong>understand nuclear reactions<\/strong> and <strong>isotope behavior<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd27 Common Uses<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u26a0\ufe0f Protactinium has <strong>no commercial or everyday uses<\/strong> due to its <strong>rarity, cost, and radioactivity<\/strong>.<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Scientific Research<\/strong>: Studied in <strong>nuclear chemistry and physics labs<\/strong> \ud83d\udd2c<\/li>\n\n\n\n<li><strong>Geology<\/strong>: Helps scientists understand <strong>age and formation of rocks<\/strong> through isotope dating<\/li>\n\n\n\n<li><strong>Education<\/strong>: Teaches students about <strong>radioactive decay and actinides<\/strong> \ud83e\udde0<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcda Conclusion<\/h2>\n\n\n\n<p>Protactinium is a <strong>rare, radioactive metal<\/strong> that plays a small but important role in <strong>scientific discovery<\/strong>. Though too dangerous and scarce for practical use, it helps researchers learn more about <strong>nuclear reactions, the Earth\u2019s history<\/strong>, and the periodic table. \ud83e\uddea\ud83c\udf0d<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udd39 Basic Information Protactinium is a rare, silvery-gray metal that\u2019s radioactive and found in trace amounts &hellip; <a title=\"Protactinium (Pa)\" class=\"hm-read-more\" href=\"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/protactinium-pa\/\"><span class=\"screen-reader-text\">Protactinium (Pa)<\/span>Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":2778,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[672],"tags":[656,652,653,661,647,643,648,670,666,664,662,650,651,645,660,663,655,646,657,659,658,665,642,644,668,669,667,649,671,654],"class_list":["post-2651","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-periodic-table-for-students","tag-actinides","tag-alkali-metals","tag-alkaline-earth-metals","tag-atomic-mass","tag-atomic-number","tag-chemical-elements","tag-chemical-symbols","tag-chemistry-basics","tag-chemistry-study-guide","tag-electron-configuration","tag-electronegativity","tag-element-groups","tag-element-periods","tag-element-properties","tag-halogens","tag-ionization-energy","tag-lanthanides","tag-mendeleev-periodic-table","tag-metalloids","tag-noble-gases","tag-nonmetals","tag-oxidation-states","tag-periodic-table","tag-periodic-table-elements","tag-periodic-table-explained","tag-periodic-table-facts","tag-periodic-table-for-students","tag-periodic-trends","tag-science-education","tag-transition-metals"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/texpertssolutions.com\/notes\/wp-content\/uploads\/2025\/06\/19.png?fit=1280%2C720&ssl=1","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2651","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/comments?post=2651"}],"version-history":[{"count":1,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2651\/revisions"}],"predecessor-version":[{"id":2661,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2651\/revisions\/2661"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/media\/2778"}],"wp:attachment":[{"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/media?parent=2651"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/categories?post=2651"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/tags?post=2651"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}