{"id":2412,"date":"2025-06-27T14:15:40","date_gmt":"2025-06-27T08:45:40","guid":{"rendered":"https:\/\/texpertssolutions.com\/notes\/?p=2412"},"modified":"2025-06-29T16:44:54","modified_gmt":"2025-06-29T11:14:54","slug":"calcium-ca","status":"publish","type":"post","link":"https:\/\/texpertssolutions.com\/notes\/2025\/06\/27\/calcium-ca\/","title":{"rendered":"Calcium (Ca)"},"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>: Calcium<\/li>\n\n\n\n<li><strong>Discovered By<\/strong>: Humphry Davy<\/li>\n\n\n\n<li><strong>Year of Discovery<\/strong>: 1808<\/li>\n\n\n\n<li><strong>Category<\/strong>: Alkaline Earth Metal<\/li>\n\n\n\n<li><strong>Group<\/strong>: 2<\/li>\n\n\n\n<li><strong>State at Room Temperature<\/strong>: Solid \ud83e\udea8<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Calcium is a <strong>soft gray metal<\/strong> that plays a <strong>vital role in the human body<\/strong> and the Earth\u2019s crust. Though it&#8217;s a metal, it\u2019s mostly found in compound form in nature.<\/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>: Ca<\/li>\n\n\n\n<li><strong>Atomic Number<\/strong>: 20<\/li>\n\n\n\n<li><strong>Atomic Mass<\/strong>: ~40.08 u<\/li>\n\n\n\n<li><strong>Valency<\/strong>: 2<\/li>\n\n\n\n<li><strong>Electronic Configuration<\/strong>: [Ar] 4s\u00b2<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Calcium is highly <strong>reactive with water and oxygen<\/strong>, which is why it\u2019s not found in pure form in nature. It easily forms white or chalky compounds like <strong>calcium carbonate (CaCO\u2083)<\/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 class=\"wp-block-paragraph\">Calcium is <strong>essential for life<\/strong> \u2014 especially for strong bones and teeth \ud83e\uddb4. It is the <strong>fifth most abundant element<\/strong> in the Earth\u2019s crust and is widely used in both living organisms and industry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the periodic table, it belongs to the <strong>alkaline earth metals<\/strong>, which are known for being shiny, reactive, and forming basic (alkaline) solutions in water.<\/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>About <strong>99% of the calcium in the human body<\/strong> is stored in bones and teeth.<\/li>\n\n\n\n<li>Calcium glows with a <strong>reddish-orange flame<\/strong> when burned \ud83d\udd25.<\/li>\n\n\n\n<li>It was isolated by <strong>electrolysis<\/strong> \u2014 the process of using electricity to break down compounds.<\/li>\n\n\n\n<li>Calcium compounds like <strong>chalk and limestone<\/strong> have been used by humans for thousands of years.<\/li>\n\n\n\n<li>It helps muscles contract and nerves function properly in the body.<\/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>Health &amp; Nutrition<\/strong>: Found in dairy products and supplements to keep bones and teeth strong. \ud83e\udd5b<\/li>\n\n\n\n<li><strong>Construction<\/strong>: Used in <strong>cement<\/strong>, <strong>plaster<\/strong>, and <strong>concrete<\/strong> (from compounds like calcium oxide and calcium carbonate). \ud83c\udfd7\ufe0f<\/li>\n\n\n\n<li><strong>Steel Making<\/strong>: Helps remove impurities during the process.<\/li>\n\n\n\n<li><strong>Agriculture<\/strong>: Used in fertilizers to enrich soil.<\/li>\n\n\n\n<li><strong>De-icing Roads<\/strong>: Calcium chloride (CaCl\u2082) is used to melt ice in winter.<\/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\">Calcium is more than just a part of milk and bones \u2014 it\u2019s a <strong>versatile, life-sustaining element<\/strong> that also helps build the world around us. From the <strong>food we eat<\/strong> to the <strong>buildings we live in<\/strong>, calcium plays a hidden but powerful role. For students, understanding calcium is a great step toward exploring how chemistry connects with health, industry, and nature. \ud83e\uddd1\u200d\ud83d\udd2c\ud83c\udf31<\/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 Calcium is a soft gray metal that plays a vital role in the human body and the Earth\u2019s crust. Though it&#8217;s a metal, it\u2019s mostly found in compound form in nature. \ud83d\udd38 Chemical Properties Calcium is highly reactive with water and oxygen, which is why it\u2019s not found in pure form in&#8230;<\/p>\n","protected":false},"author":1,"featured_media":2780,"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-2412","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: Calcium Discovered By: Humphry Davy Year of Discovery: 1808 Category: Alkaline Earth Metal Group: 2 State at Room Temperature: Solid \ud83e\udea8 Calcium is a soft gray metal that plays a vital role in the human body and the Earth\u2019s crust. 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