{"id":2576,"date":"2025-06-27T15:56:34","date_gmt":"2025-06-27T10:26:34","guid":{"rendered":"https:\/\/texpertssolutions.com\/notes\/?p=2576"},"modified":"2025-06-29T16:44:52","modified_gmt":"2025-06-29T11:14:52","slug":"gold-au","status":"publish","type":"post","link":"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/gold-au\/","title":{"rendered":"Gold (Au)"},"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>: Gold<\/li>\n\n\n\n<li><strong>Discovered By<\/strong>: Known since ancient times (no specific discoverer)<\/li>\n\n\n\n<li><strong>Year of Discovery<\/strong>: Prehistoric (used by ancient Egyptians and Mesopotamians)<\/li>\n\n\n\n<li><strong>Category<\/strong>: Transition Metal<\/li>\n\n\n\n<li><strong>Group<\/strong>: 11<\/li>\n\n\n\n<li><strong>State at Room Temperature<\/strong>: Solid (shiny yellow metal) \ud83d\udc9b<\/li>\n<\/ul>\n\n\n\n<p>Gold is one of the <strong>most famous and valuable metals<\/strong> on Earth. It doesn\u2019t rust, tarnish, or corrode, making it both <strong>beautiful and durable<\/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\udd38 Chemical Properties<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chemical Symbol<\/strong>: Au <em>(from Latin &#8220;Aurum&#8221; meaning &#8220;shining dawn&#8221;)<\/em><\/li>\n\n\n\n<li><strong>Atomic Number<\/strong>: 79<\/li>\n\n\n\n<li><strong>Atomic Mass<\/strong>: ~196.97 u<\/li>\n\n\n\n<li><strong>Valency<\/strong>: +1, +3<\/li>\n\n\n\n<li><strong>Electronic Configuration<\/strong>: [Xe] 4f\u00b9\u2074 5d\u00b9\u2070 6s\u00b9<\/li>\n<\/ul>\n\n\n\n<p>Gold is <strong>non-reactive<\/strong> \u2014 it doesn\u2019t mix easily with oxygen or most acids, which is why it stays shiny for centuries! \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>Gold has been used for <strong>coins, jewelry, art, and decoration<\/strong> for thousands of years. It\u2019s also <strong>very soft and malleable<\/strong>, so it\u2019s often mixed with other metals to make it stronger for everyday use.<\/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>Gold is so soft, <strong>1 gram can be hammered into a sheet 1 square meter wide!<\/strong> \ud83e\ude99<\/li>\n\n\n\n<li>It&#8217;s one of the few elements that is <strong>naturally yellow<\/strong>.<\/li>\n\n\n\n<li>Pure gold is <strong>24 karats<\/strong> \u2014 any number lower means it&#8217;s mixed with other metals.<\/li>\n\n\n\n<li>Gold is an <strong>excellent conductor<\/strong> of electricity, even better than copper. \u26a1<\/li>\n\n\n\n<li>It&#8217;s used in <strong>spacecraft<\/strong> to reflect sunlight and protect instruments. \ud83d\ude80<\/li>\n\n\n\n<li>All the gold on Earth likely came from <strong>ancient meteorites<\/strong> that hit the planet billions of years ago! \u2604\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\udd27 Common Uses<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Jewelry &amp; Ornaments<\/strong>: The most common and historic use \u2014 gold rings, chains, and crowns. \ud83d\udc51\ud83d\udc8d<\/li>\n\n\n\n<li><strong>Electronics<\/strong>: Found in <strong>smartphones, computers, and connectors<\/strong> due to its high conductivity. \ud83d\udcf1\ud83d\udcbb<\/li>\n\n\n\n<li><strong>Finance<\/strong>: Used in <strong>coins, bars, and as a global standard of value<\/strong>. \ud83d\udcb5<\/li>\n\n\n\n<li><strong>Dentistry<\/strong>: Gold is safe and long-lasting for <strong>tooth fillings and crowns<\/strong>. \ud83e\uddb7<\/li>\n\n\n\n<li><strong>Medicine<\/strong>: Certain gold compounds are used in <strong>arthritis treatments<\/strong> and medical research.<\/li>\n\n\n\n<li><strong>Aerospace<\/strong>: Gold-coated films protect <strong>satellites and astronauts<\/strong> from solar radiation. \ud83d\udef0\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>Gold is much more than just a shiny treasure \u2014 it&#8217;s a <strong>chemically fascinating, historically important, and highly useful<\/strong> element. From jewelry to electronics and space travel, gold proves that <strong>beauty and utility can shine together<\/strong>. For students, it\u2019s a perfect example of how chemistry connects to <strong>culture, history, and modern tech<\/strong>. \ud83d\udd2c\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 Gold is one of the most famous and valuable metals on Earth. It &hellip; <a title=\"Gold (Au)\" class=\"hm-read-more\" href=\"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/gold-au\/\"><span class=\"screen-reader-text\">Gold (Au)<\/span>Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":2742,"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-2576","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\/101.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\/2576","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=2576"}],"version-history":[{"count":1,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2576\/revisions"}],"predecessor-version":[{"id":2581,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/posts\/2576\/revisions\/2581"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/media\/2742"}],"wp:attachment":[{"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/media?parent=2576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/categories?post=2576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/texpertssolutions.com\/notes\/wp-json\/wp\/v2\/tags?post=2576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}