{"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 class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\">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 class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udd39 Basic Information Gold is one of the most famous and valuable metals on Earth. It doesn\u2019t rust, tarnish, or corrode, making it both beautiful and durable. \ud83d\udd38 Chemical Properties Gold is non-reactive \u2014 it doesn\u2019t mix easily with oxygen or most acids, which is why it stays shiny for centuries! \u2728 \ud83d\udcd8 Basic Things&#8230;<\/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":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\ud83d\udd39 Basic Information Element Name: Gold Discovered By: Known since ancient times (no specific discoverer) Year of Discovery: Prehistoric (used by ancient Egyptians and Mesopotamians) Category: Transition Metal Group: 11 State at Room Temperature: Solid (shiny yellow metal) \ud83d\udc9b Gold is one of the most famous and valuable metals on Earth. 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