A unique symbol that is recognized throughout the

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  • CHEM 25
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a unique symbol that is recognized throughout the scientific world. The chemical symbols are the alphabet of the universal language of chemistry.Part BA chemist classifying five elements determines the following:ElementProperty: SulfurSoft yellow solid: SilverShiny solid at room temperature that is also a good conductor of heat and electricity: SiliconSemiconductor: NeonInert gas at room temperature: MercurySilvery liquid that is used in thermometers and fluorescent lightsUse these properties to classify the substances as metals, metalloids (semimetals), or nonmetals.Drag the appropriate elements to their respective bins.SAgSiNeHgHint 1.The characteristics of metals, nonmetals, and metalloids (semimetals)Metals are generally solids at room temperature with the exception ofmercury, which is liquid at room temperature. Metals have a lustrous (or shiny)appearance and are good conductors of heat and electricity.Nonmetals on the other hand are gases or pale, brittle, or soft solids that are bad conductors of heat and electricity.Metalloids (semimetals) can be induced to conduct electricity to a small extent and thus are known assemiconductors.ANSWER:
3/21/15, 7:42 PMChapters 3 and 4Correct
Page 21 of 24
Part CIn Part B, you classified the elements as metals, nonmetals, and metalloids (semimetals). Based on this classification, identify the position of the elementsin the periodic table. Consider that the metals are always on the left-hand side of the periodic table, and nonmetals are on the right-hand side. Metalloids(semimetals) are placed in between these two groups. Drag the element symbol to its respective position in the periodic table.Drag the appropriate labels to their respective targets.Hint 1.How elements are arranged in the periodic tableThe elements are arranged in the periodic table according to their atomic numbers.The metals are arranged on the left side of the periodic table, the nonmetals are on the extreme right, and the semimetals are placed in betweenmetals and nonmetals.The periodic table also tells us whether the substance is solid, liquid, or gaseous.Hint 2.Identify the physical state of the elementsIn Part B, you identified the elements as metals, nonmetals, and metalloids (semimetals) based on the properties of the elements like their physicalstate, appearance, and conductivity. Based on the information in Part B, classify the elements as solids, liquids, or gases.Drag the appropriate elements to their respective bins.
3/21/15, 7:42 PMChapters 3 and 4Page 22 of 24ANSWER:CorrectExercise 4.95Rb85Rb87
3/21/15, 7:42 PMChapters 3 and 4Page 23 of 24Rubidium has two naturally occurring isotopes:with mass 84.9118and a natural abundance of 72.17%, andwith mass 86.9092and a natural abundance of 27.83%.

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Term
Spring
Professor
JimmyLi
Tags
Chemistry, Atom, Chemical element, Ernest Rutherford

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