- published: 24 Feb 2012
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The carbon group is a periodic table group consisting of carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl).
In modern IUPAC notation, it is called Group 14. In the field of semiconductor physics, it is still universally called Group IV. The group was once also known as the tetrels (from Greek tetra, four), stemming from the Roman numeral IV in the group names, or (not coincidentally) from the fact that these elements have four valence electrons (see below). The group is sometimes also referred to as tetragens or crystallogens.
Like other groups, the members of this family show patterns in electron configuration, especially in the outermost shells, resulting in trends in chemical behavior:
Each of the elements in this group has 4 electrons in its outer orbital (the atom's top energy level). The last orbital of all these elements is the p2 orbital. In most cases, the elements share their electrons. The tendency to lose electrons increases as the size of the atom increases, as it does with increasing atomic number. Carbon alone forms negative ions, in the form of carbide (C4−) ions. Silicon and germanium, both metalloids, each can form +4 ions. Tin and lead both are metals while flerovium is a synthetic, radioactive (its half life is very short), element that may have a few noble gas-like properties, though it is still most likely a post-transition metal. Tin and lead are both capable of forming +2 ions.
Paul Andersen describes the macromolecules that make up living organisms. He starts with a brief description of organic chemistry and the importance of functional groups. He also covers both dehydration and hydrolysis in polymerization. He finally covers the four major macromolecules: nucleic acids, proteins, lipids and carbohydrates. Intro Music Atribution Title: I4dsong_loop_main.wav Artist: CosmicD Link to sound: http://www.freesound.org/people/CosmicD/sounds/72556/ Creative Commons Atribution License
In this Top 10, I present to you a list of computer hackers who did some UNBELIEVABLE things that caused a LOT of damage and problems! Subscribe! New videos every Mon/Wed/Fri! http://bit.ly/SantoroSubscribe ✦Follow me on social media!✦ Snapchat: MatthewSantoro Twitter: http://twitter.com/MatthewSantoro Instagram: http://instagr.am/MatthewSantoro Facebook Profile: http://fb.com/MatthewMSantoro Facebook Page: http://fb.com/MatthewSantoroOfficial ✦My Other Channels!✦ My Gaming Channel: http://bit.ly/SantoroGamingSubscribe My Vlog Channel: http://bit.ly/SantoroVlogsSubscribe ✦The Team!✦ Written/Edited by: Matthew Santoro, Jim Vaylin, Brock Sumner ✦Sources✦ http://www.makeuseof.com/tag/5-of-the-worlds-most-famous-hackers-what-happened-to-them/ http://list25.com/25-most-notorious-hackers-to-...
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Tony Lovell will explain the reasoning behind how more green growing plants means more captured carbon dioxide -- more water -- more production -- more biodiversity -- more profit. Did you know that a 1% change in soil organic matter across just one-quarter of the World's land area could sequester 300 billion tonnes of physical CO2. TEDxDubbo focused attention on what we call FACETS -- Food, Agriculture, Climate, Energy, Topsoil and Sustainability. These FACETS are actually potent ideas shared by everyday people with an interest in these disciplines. In many of these topics there is an awareness campaign; the aim of bringing our community together united against catastrophic failures in our food-chain, environment and health. It is worth mentioning that we are also indebted to our natur...
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Chúc các bạn có những phút giây thật vui, 1 like + 1 lượt đăng ký là động lực để chúng tôi có thể làm tiếp các clip mới . Music : ============================================== Soft: ADOBE AFTER EFFECT 6 / SONY VEGAS PRO 12 COREL VIDEO STUDIO X6 / BANDICAM ..... ============================================= Thông tin cá nhân : (Aly)https://www.facebook.com/hoaian.trinh.3?fref=ts (Rudo) https://www.facebook.com/tuoi.ho.75?fref=ts (Turtle) https://www.facebook.com/ltq.oc?fref=ts (One) https://www.facebook.com/levotanphat1?fref=ts (Snail)https://www.facebook.com/ltq.oc?fref=ts ============================================= Face Book : https://www.facebook.com/tuoi.ho.75 Fanpage : https://www.facebook.com/pages/Ho-Dai-rudo-Hoai-Tuoi/1402490996709084 Mouse : 15 - 35
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Dr. Sailesh Rao, an electrical engineer who "fixed" the Internet in the '90s was inspired by Al Gore to apply his mind for systems to the problem of climate change. His first book, Carbon Dharma (2011) explored his discovery that the core of the problem lies in animal agriculture, a blind spot protected by the status quo and proponents of infinite growth (including Gore). Turning from the Climate Reality path and becoming an Executive Producer on Cowspiracy: The Sustainability Secret, Dr. Rao's second book expands on the "correct thought" of Carbon Dharma to the "correct action" of Carbon Yoga: The Vegan Metamorphosis." Spoiler: We all go vegan, and the transformation may very well be led by the religious communities of the world. (See comments for topical index)
Chúc các bạn có những phút giây thật vui, 1 like + 1 lượt đăng ký là động lực để chúng tôi có thể làm tiếp các clip mới . Music : Itro & Tobu - Cloud 9 [NCS Release] ============================================== Soft: ADOBE AFTER EFFECT 6 / SONY VEGAS PRO 12 COREL VIDEO STUDIO X6 / BANDICAM ..... ============================================= Thông tin cá nhân : (Aly)https://www.facebook.com/hoaian.trinh.3?fref=ts (Rudo) https://www.facebook.com/tuoi.ho.75?fref=ts (Turtle) https://www.facebook.com/ltq.oc?fref=ts (One) https://www.facebook.com/levotanphat1?fref=ts (Snail)https://www.facebook.com/ltq.oc?fref=ts ============================================= Face Book : https://www.facebook.com/tuoi.ho.75 Fanpage : https://www.facebook.com/pages/Ho-Dai-rudo-Hoai-Tuoi...
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