{"id":2564,"date":"2025-06-27T15:53:39","date_gmt":"2025-06-27T10:23:39","guid":{"rendered":"https:\/\/texpertssolutions.com\/notes\/?p=2564"},"modified":"2025-06-29T16:44:52","modified_gmt":"2025-06-29T11:14:52","slug":"promethium-pm","status":"publish","type":"post","link":"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/promethium-pm\/","title":{"rendered":"Promethium (Pm)"},"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>: Promethium<\/li>\n\n\n\n<li><strong>Discovered By<\/strong>: Jacob Marinsky, Lawrence Glendenin, and Charles Coryell<\/li>\n\n\n\n<li><strong>Year of Discovery<\/strong>: 1945<\/li>\n\n\n\n<li><strong>Category<\/strong>: Lanthanide (Rare Earth Metal)<\/li>\n\n\n\n<li><strong>Group<\/strong>: f-block<\/li>\n\n\n\n<li><strong>State at Room Temperature<\/strong>: Solid (silvery metal, but unstable) \u2699\ufe0f<\/li>\n<\/ul>\n\n\n\n<p>Promethium is a <strong>rare, radioactive element<\/strong> \u2014 the only lanthanide that <strong>has no stable isotopes<\/strong>. It <strong>doesn&#8217;t occur naturally in large amounts<\/strong>, only in trace quantities.<\/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>: Pm<\/li>\n\n\n\n<li><strong>Atomic Number<\/strong>: 61<\/li>\n\n\n\n<li><strong>Atomic Mass<\/strong>: ~145 u (varies depending on isotope)<\/li>\n\n\n\n<li><strong>Valency<\/strong>: +3<\/li>\n\n\n\n<li><strong>Electronic Configuration<\/strong>: [Xe] 4f\u2075 6s\u00b2<\/li>\n<\/ul>\n\n\n\n<p>Promethium <strong>glows faintly blue in the dark<\/strong> due to its radioactivity! \u2728<\/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>Promethium was named after <strong>Prometheus<\/strong>, the Greek titan who stole fire from the gods \u2014 a nod to its radioactive and glowing nature. \ud83d\udd25<br>It was the <strong>last of the lanthanides to be discovered<\/strong> and is mostly produced artificially in nuclear reactors.<\/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>Promethium is so rare that <strong>only about 500\u2013600 grams<\/strong> exist naturally on Earth at any time! \ud83c\udf0d<\/li>\n\n\n\n<li>It\u2019s mostly made <strong>artificially from uranium fuel in nuclear reactors<\/strong>.<\/li>\n\n\n\n<li>Emits <strong>beta radiation<\/strong>, which is used in specialized tools and equipment. \u2622\ufe0f<\/li>\n\n\n\n<li>Promethium is used in <strong>devices where a steady glow or electric current is needed<\/strong>, like satellite batteries. \ud83d\udef0\ufe0f<\/li>\n\n\n\n<li>It is too radioactive and rare for common use in everyday items.<\/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<ul class=\"wp-block-list\">\n<li><strong>Nuclear Batteries<\/strong>: Used in <strong>spacecraft and military equipment<\/strong> for long-lasting power. \ud83d\udd0b<\/li>\n\n\n\n<li><strong>Luminous Paints<\/strong> (historically): Used in <strong>glow-in-the-dark dials and signs<\/strong>, but now replaced due to safety concerns. \ud83c\udf0c<\/li>\n\n\n\n<li><strong>Thickness Gauges<\/strong>: Helps measure the <strong>thickness of materials<\/strong> using radiation. \ud83d\udccf<\/li>\n\n\n\n<li><strong>Scientific Research<\/strong>: Studied in laboratories to understand <strong>nuclear decay and radiation<\/strong>. \ud83e\uddea<\/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>Promethium is a <strong>glowing, radioactive metal<\/strong> with a name rooted in myth and a role rooted in science. Though rare and too dangerous for daily use, it plays a quiet but important role in <strong>space, research, and technology<\/strong>. For students, it\u2019s a perfect example of how even <strong>invisible elements<\/strong> can shine bright in science! \u2622\ufe0f\ud83d\udd2c<\/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 Promethium is a rare, radioactive element \u2014 the only lanthanide that has no &hellip; <a title=\"Promethium (Pm)\" class=\"hm-read-more\" href=\"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/promethium-pm\/\"><span class=\"screen-reader-text\">Promethium (Pm)<\/span>Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"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-2564","post","type-post","status-publish","format-standard","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":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2564","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=2564"}],"version-history":[{"count":1,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2564\/revisions"}],"predecessor-version":[{"id":2578,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2564\/revisions\/2578"}],"wp:attachment":[{"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/media?parent=2564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/categories?post=2564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/tags?post=2564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}