{"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 class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\">\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 class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\"><\/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 in uranium ores. It\u2019s part of the actinide series on the periodic table. \ud83d\udd38 Chemical Properties It behaves chemically like uranium and thorium and is known for forming complex compounds with oxygen and halogens. \ud83d\udcd8 Basic Things to Know&#8230;<\/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":[],"aioseo_head":"\n\t\t<!-- 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