{"id":2616,"date":"2025-06-27T16:28:10","date_gmt":"2025-06-27T10:58:10","guid":{"rendered":"https:\/\/texpertssolutions.com\/notes\/?p=2616"},"modified":"2025-06-29T16:44:51","modified_gmt":"2025-06-29T11:14:51","slug":"astatine-at","status":"publish","type":"post","link":"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/astatine-at\/","title":{"rendered":"Astatine (At)"},"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>: Astatine<\/li>\n\n\n\n<li><strong>Discovered By<\/strong>: Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segr\u00e8<\/li>\n\n\n\n<li><strong>Year of Discovery<\/strong>: 1940<\/li>\n\n\n\n<li><strong>Category<\/strong>: Halogen (Group 17)<\/li>\n\n\n\n<li><strong>Group<\/strong>: 17 (Halogens)<\/li>\n\n\n\n<li><strong>State at Room Temperature<\/strong>: Solid (assumed, not directly observed in bulk) \u2699\ufe0f<\/li>\n<\/ul>\n\n\n\n<p>Astatine is an <strong>extremely rare, radioactive element<\/strong> that is part of the <strong>halogen family<\/strong>, like iodine and chlorine.<\/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>: At<\/li>\n\n\n\n<li><strong>Atomic Number<\/strong>: 85<\/li>\n\n\n\n<li><strong>Atomic Mass<\/strong>: ~210 u (varies with isotope)<\/li>\n\n\n\n<li><strong>Valency<\/strong>: -1, +1, +3, +5, +7<\/li>\n\n\n\n<li><strong>Electronic Configuration<\/strong>: [Xe] 4f\u00b9\u2074 5d\u00b9\u2070 6s\u00b2 6p\u2075<\/li>\n<\/ul>\n\n\n\n<p>Astatine is chemically similar to iodine but is much more <strong>unstable and radioactive<\/strong>.<\/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>Only <strong>tiny traces of astatine<\/strong> exist naturally \u2014 it&#8217;s <strong>so rare<\/strong> that scientists have never seen a visible piece of it. Most of what we know is based on <strong>predictions and lab experiments<\/strong>.<\/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>The name <strong>\u201castatine\u201d<\/strong> comes from the Greek word <em>\u201castatos\u201d<\/em>, meaning <strong>unstable<\/strong> \u26a0\ufe0f<\/li>\n\n\n\n<li>Astatine is the <strong>rarest naturally occurring element<\/strong> in Earth\u2019s crust \ud83c\udf0d<\/li>\n\n\n\n<li>If you had enough astatine to see, it would <strong>vaporize from its own heat<\/strong> caused by radiation \ud83d\udca8\ud83d\udd25<\/li>\n\n\n\n<li>Its properties are not fully known due to how <strong>short-lived<\/strong> it is<\/li>\n\n\n\n<li>It is <strong>radioactive and toxic<\/strong>, so it&#8217;s handled only under strict lab conditions \ud83e\uddea\ud83d\uded1<\/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 Astatine has <strong>no everyday or commercial use<\/strong> because of its rarity and high radioactivity.<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cancer Treatment Research<\/strong>: Astatine-211 is being studied for <strong>targeted alpha therapy<\/strong> (TAT) for cancer cells \ud83e\uddec\ud83e\ude7a<\/li>\n\n\n\n<li><strong>Scientific Research<\/strong>: Used in experiments to understand radioactive halogens and atomic behavior \ud83d\udd2c<\/li>\n\n\n\n<li><strong>Nuclear Medicine<\/strong>: Shows promise in treating <strong>thyroid and brain tumors<\/strong>, though it&#8217;s still experimental \u2695\ufe0f<\/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>Astatine is a <strong>mysterious and powerful element<\/strong> \u2014 rare, radioactive, and still being studied. For students, it shows how even elements we can\u2019t easily see can hold <strong>huge potential in science and medicine<\/strong>! \ud83c\udf20\ud83d\udd0d<\/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 Astatine is an extremely rare, radioactive element that is part of the halogen &hellip; <a title=\"Astatine (At)\" class=\"hm-read-more\" href=\"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/astatine-at\/\"><span class=\"screen-reader-text\">Astatine (At)<\/span>Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":2711,"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-2616","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\/70.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\/2616","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=2616"}],"version-history":[{"count":1,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2616\/revisions"}],"predecessor-version":[{"id":2629,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2616\/revisions\/2629"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/media\/2711"}],"wp:attachment":[{"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/media?parent=2616"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/categories?post=2616"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/tags?post=2616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}