to see the flame color change. I then repeated this process for the rest of the chemicals. Data Table 1: Flame Test Chemical Well-Plate # Flame Color NaNO3 A-1 Yellow Sr(NO3)2 A-2 Red KNO3 A-3 Purple Cu(NO3)2 A-4 Green Ba(NO3)2 A-5 Light Green LiNO3 A-6 Red Ca(NO3)2 B-1 Orange Sr(NO3)2 or Li(NO3)2 B-2 Red Questions A. All chemical used in this test are binary compounds. What portion of the periodic table is responsible for the color observed? Group 1 and 2 B. In cooking over an open flame‚ a yellow
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Dr. John Andraos‚ http://www.careerchem.com/NAMED/Elements-Discoverers.pdf 1 NAMES OF SCIENTISTS ASSOCIATED WITH DISCOVERIES OF ELEMENTS OF PERIODIC TABLE © Dr. John Andraos 2002 - 2005 Department of Chemistry‚ York University 4700 Keele Street‚ Toronto‚ ONTARIO M3J 1P3‚ CANADA For suggestions‚ corrections‚ additional information‚ and comments please send e-mails to jandraos@yorku.ca http://www.chem.yorku.ca/NAMED/ Z‚ Element Symbol Discoverer Dates Nationality Place
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EVOLUTION IMMUNE SYSTEM STRUCTURE & FUNCTION OF THE HUMAN BODY- ORGAN SYSTEM REPRODUCTION IN PLANTS A REPRESENTATIVE STUDY OF MAMALS LIFE PROCESSES CONSERVATION OF ENVIRONMENT WASTE WATER MANAGEMENT SOLUTIONS ATOMS AND MOLECULES CHEMICAL REACTION PERIODIC CLASSIFICATION OF ELEMENTS CARBON AND ITS COMPOUNDS MEASUREMENT LAWS OF MOTION AND GRAVITATION ELECTRICITY AND ENERGY MAGNETIC EFFECT OF ELECTRIC CURRENT AND LIGHT 1 1 0 1 0 1 1 0 1 0 1 2 1 0 1 2 2 15 1 1 3 1 3 1 1 3 2 1 2 2 1 0 2 3 3 30
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surveyed‚ the view that Moseley’s experimental demonstration of the concept of atomic number resolved all issues in a categorical fashion is once again shown to be highly misleading. Early Claims for Element 85 The position of element 85 in the periodic table shows it to lie among the halogens. Not surprisingly‚ therefore‚ the early researchers believed that they would find the element in similar locations to other halogens such as bromine and iodine‚ namely in the oceans or in sands washed up by oceans
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mentioned element has 29 electrons‚ 29 protons and 34 neutrons. Moreover‚ it has 29 isotopes. Some of them are resistant and other are radioactive. Copper known as a transition metal and located in the eleven’s column and on the fourth period in periodic table. It has 4 shells and in the valence shell there are 11 electrons. Copper has 1 s orbital electron and full d-orbital‚ which explains the ability being ductile and conductivity. According to physical properties‚ copper is reddish brown metal
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Valence Electrons The valence electrons are the electrons in the last shell or energy level of an atom. They do show a repeating or periodic pattern. The valence electrons increase in number as you go across a period. Then when you start the new period‚ the number drops back down to one and starts increasing again. For example‚ when you go across the table from carbon to nitrogen to oxygen‚ the number of valence electrons increases from 4 to 5 to 6. As we go from fluorine to neon to sodium‚ the
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(called precipitate)‚ change in temperature or light‚ not easily reversed Family: a column (groups) of elements with similar properties * four main groups: Alkali Metals‚ Alkali Earth Metals‚ Halogens and Noble Gases Period: rows on the periodic table Metal: an element that is lustrous‚ malleable‚ ductile and conducts heat and electricity;
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neon on a daily basis as opposed to other elements such as pure gold or silver. Our world is much more colorful as a result of neon. The symbol of Neon is Ne. It is also in group 18 of the periodic table so it is classified as a noble gas. The atomic number of Neon is 10. Neon is the 10th element on the periodic table. This essay will discuss the many uses of Neon and its origins as well as the scientific aspect of the element such as its electron configuration‚ physical properties and chemical properties
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The Atomic Mass of Metallo You may have noticed on the periodic table that the atomic mass of an element is usually not a whole number. That happens because of isotopes. An atom that is missing a neutron or has an extra neutron is called an isotope. They are still the same element; however‚ they are just a little different from every other atom of the same element. Most of the carbon atoms in the universe are Carbon-12‚ with 6 neutrons. A small percentage of carbon atoms are Carbon-13‚ with
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Lanthanides and Actinides The lanthanides and the actinides make up the f block of the periodic table. The lanthanides are the elements produced as the 4f sub level is filled with electrons and the actinides are formed while filling the 5f sub level Some significant similarities and differences between lanthanides and actinides are observed. The two rows that are generally placed underneath the main periodic table are called the lanthanides series and the actinides series. These two rows are produced
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