{"id":619849,"date":"2026-01-18T19:58:42","date_gmt":"2026-01-18T18:58:42","guid":{"rendered":"https:\/\/cronologia-universale.it\/march-7-1813\/"},"modified":"2026-01-18T19:58:42","modified_gmt":"2026-01-18T18:58:42","slug":"1801-4","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/1801-4\/","title":{"rendered":"1801"},"content":{"rendered":"<p>Humphry Davy announces the discovery of two new metals: potassium and sodium, the two most reactive metals known to science. Davy will continue his work with other alkaline earths such as lime and magnesia, eventually discovering other metals in 1808: calcium, magnesium, strontium, and barium.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Humphry Davy announces the discovery of two new metals: potassium and sodium, the two most&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-619849","post","type-post","status-publish","format-standard","hentry","category-vg-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>1801 - Cronologia Universale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cronologia-universale.it\/en\/1801-4\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1801 - 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