What is the symbol of the species that has 16 protons and 18 electrons? 13. An atom that has the same number of neutrons as 58 a. 59Ni. b. 57Co. c. 60Cu. d. Fe. 59 Co is e. 58 Ni. 59 Co has 59-27 = 32 n 14. A certain element is listed as having 72.6 atomic mass units. It is probably true that it contains a. a mixture of isomers. b. a mixture of allotropes. c. a mixture of isotopes. d. a mixture of enantiomers. e. an impurity. Since the mass is not a whole number
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opening statement I would like to proudly say cobalt is an element which has its own gum. Though completely irrelevant to my report I enjoy it’s succulent‚ minty and long lasting flavor‚ because five… will stimulate your senses. I figure I might as well go into the greater details of cobalt as well as what it is and how it came to be. In the year 1739‚ Swedish chemist‚ Georg Brandt was trying to prove to his colleges that Bismuth‚ the element credited for its believed ability to turn glass blue‚ was
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ZINC Zinc is one of the natural elements on the periodic table. It was discovered in Germany in 1746‚ by Andreas Marggraf. The name is from the German‚ ‘zinc’‚ which may be derived from Persian‚ which means ‘sing’. The element was known to the Romans but they rarely used it. When it was first used it was recognized. Zinc has a specification of metal made from ore or another material a process of distillation by electrolysis. The atomic number for zinc is 30. The mass number is 65.39 mass units
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Cobalt My report is about the element Cobalt. Cobalt is the 27th element on the periodical table and has an atomic number of twenty-seven. It has a symbol of Co. Cobalt¹s atomic weight is 58.9332. It has a melting point of 1‚490 C. and a boiling point of 2‚900 C. Cobalt looks almost exactly like iron and nickel. Cobalt is between iron and nickel on the periodical table and found in only . 001-.002 percent of the earth¹s crust. Cobalt was first found in the Harz Mountains. People in
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The Displacement Reactions Purpose: to see how displacement reaction works with different chemicals and what chemical has more reactivity series then other Hypothesis: Iron + Copper Sulfate: Iron will displace copper because it is more reactive and it is going to end up as Iron Sulphide + Copper Copper + Silver Nitrate: Copper will displace Silver because it is more reactive and it is going to end up as Copper Nitride + Magnesium + Copper oxide: Magnesium will displace Copper because it
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the earliest elements explored by humanity. Due to the special red shade it was easy to find in ancient times. The metal was named according to place where it was found‚ the Cyprus islands. Copper produced in massive stars and spread in the world as minerals like chalcocite and chalcopyrite (sulfide of copper)‚ azurite and malachite (carbonate of copper)‚ cuprite (oxide of copper). The atomic number of copper is 29 and the atomic mass is 63.546‚ which means that mentioned element has 29 electrons
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Experiment #: 1 Date: September 18‚ 2013 Title: Isotopes of Paperclipium Purpose: To determine the isotopic composition of the element‚ paperclipium. Background Information: Isotopes are atoms of the same element with the same proton number but different mass number; that is‚ the number of neutrons differ. Isotopes of the same element have the same electronic configuration as they have the same number of electrons. This accounts for the fact that their chemical properties are the same‚ as the
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paint used on toy cars‚ and secondly to determine what other elements‚ and in which quantities‚ were present. Two different digestion methods were followed‚ and both confirmed the presence of Ba and Fe‚ although the concentrations obtained by each method differed: higher values m/m% was obtained for all samples digested by HCl than for samples digested by acetic acid. INTRODUCTION Trace amounts of many natural occurring chemical elements such as sodium‚ magnesium and iron are needed for the proper
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hands. Background Information: When chemical compounds are heated‚ hey gain energy. The electrons in some of these chemicals will jump from their ground state electron configuration (such as the electron configurations we have ben drawing for the elements) to higher energy levels. As these electrons fall back to their original positions in the atom‚ they emit energy. One form of this energy is light energy. This is what you will be observing in this experiment. Materials: · Nichrome wire
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Sodium From Wikipedia‚ the free encyclopedia This article is about the chemical element. For the PlayStation Home game‚ see Sodium (PlayStation Home). For the racehorse‚ seeSodium (horse). "Natrium" redirects here. For the town in West Virginia‚ see Natrium‚ West Virginia. Sodium 11Na
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