Bismuth was discovered in the fifteenth century by a french chemist named Claude Geoffroy the Younger. At first his colleagues thought he was crazy‚ thinking that he had found lead or tin. But Geoffroy had distinguished it as a unique element. The name Bismuth comes from the word Wisuth meaning “white mass”‚ because pure Bismuth is white. When pure bismuth is mixed with lead‚ tin‚iron or cadmium the multi colored Bismuth is created. Bismuth falls under the pnictogen family. This family consists
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Miami Dade College Chemistry‚ Physics & Earth Science Department Kendall Campus Summer 2012-03 CHM 1033- Chemistry: General‚ Organic and Biological Instructor information: Instructor Name (Summer A): (Summer B): Julia Maria Diaz-Consul‚ Ph.D. Maria Tarafa‚ Ph.D. Email: jdiazcon@mdc.edu mtarafa@mdc.edu Webpage: http://faculty
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Quiz 1- 4‚5‚12 Quiz 3- 14‚ 16‚ 18 14. What is the electron configuration for aluminum? 1s22s22p63s23p1 16. The number of electron levels in a magnesium atom is 3‚ because magnesium is in period number 3. 18. What is the abbreviated electron configuration for nickel (atomic number 28)? [Ar]4s23d8 Quiz 5- 4‚14‚ 18 5. The ion of aluminum is Answer: Al3+. 14. How many valence electrons are in the electron-dot structure of H2O? Answer: The number of valence electrons in
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I am going to discuss the modern concept of the atom. I am going to give a brief history of the atomic model including Thomson’s atom‚ Rutherford’s atom‚ Bohr’s atom‚ and Schrödinger’s atom. I am going to include a diagram for each of these models. In 1897 physicist‚ J.J. Thomson‚ shortly after discovering electrons‚ proposed his Plum-Pudding model of the atom. He based this model on the two facts that he knew at the time: 1. atoms contain small negatively charged particles called electrons
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In this lab‚ each person in the group will have two pennies. Galvanization of a penny will create a brass penny. Galvanizing the penny in sodium hydroxide with zinc causes the penny to turn from bronze to silver. Once the penny is fully galvanized you will burn the penny and spray it off and then it will turn gold. There will be a weight change also a mass change. Observing the penny to see it turn from bronze to silver to gold. Literature review Covalent bonding is a bond when atoms share pairs
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Cobalt Wedding Bands Review Cobalt wedding bands are crafted having a super strong metal that mixes an incredibly higher level of sturdiness using the vibrant reflective appearance of white gold or platinum. Using the many pros cobalt engagement rings have to give you‚ cobalt rings might even at some point exceed tungsten and titanium wedding rings. To discover if this sounds like the best metal for the wedding ring‚ and also to begin to see the benefits and drawbacks of cobalt plus how cobalt
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The name silver is derived from the old Anglo-Saxon word ‘seolfor’‚ and the symbol (Ag) comes from the Latin name Argentum. From B.C times to present‚ the way the element silver is prepared‚ used and priced has slowly changed and evolved. Although these things change over the course of history‚ the chemical and physical properties of silver and any other element do not. Silver was not only used in Ancient Times‚ but throughout the Bible as well. Considered a precious metal since Ancient times‚ the
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what is the identity of the element x in the following ions? what are the likely ground-state electron configurations of the following anions N3-: 1s2 2s2 2p6 Se2-: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 5s2 4d4 Identify the element whose 2+ ions has the ground state electron configuration [Ar] 3d^10 Zinc Which has the smaller second ionization energy‚ K or Ca? CaThree atoms have the following electron configuration. a) 1s2 2s2 2p6 3s2 3p3 b) 1s2 2s2 2p6 3s2 3p6 c) 1s2 2s2 2p6 3s2 3p6 4s2
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INORGANIC CHEMISTRY – CLASS XI (ISC) Properties of Group 1 elements [Alkali metals] 1. Due to high reactivity‚ alkali metals do not occur free in nature. Elements of group 1 (or IA) are known as alkali metals because their hydroxides are soluble in water and form strongly alkaline solutions. Alkali metals are stored under kerosene oil because they get tarnished on exposure to air. 2. The general electron configuration of alkali metals is ns1. 3. Alkali metals have largest size and lowest
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Our planet Earth is unique in the solar system because as far as we know‚ life can exist only on Earth. Since life evolved‚ many processes have been taking place. Many elements have been present on Earth. Mankind has always had the thirst to find out why and how things happen. Mankind started to learn and research new and new things and thus the way of living started to improve. Science is the study of things. There are many branches of Science like Nature Science‚ Physics‚ Biology‚ Botany and many
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