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Periodic table Answers Activity 6-F Pages 219, 220 et 221
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Part 1 2.BerylliumBeZ = 4 BoronBZ = 5 CarbonCZ = 6 nitrogenNZ = 7 OxygenOZ = 8 FluorineFZ = 9 NeonNeZ = 10
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Part 1- Analyze a)Silicon Si. Because Si is under C. b)Phosphorus P. Because P is after Si. c)Sodium Na. It is in row 3 under Be.
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Part - 2 1.The elements of group 2 are : - Beryllium Be -Magnesium Mg -Calcium Ca -Strontium Sr -Baryum Ba Note : For names, see page 562
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Part - 2 2.The symbols : - Beryllium BeZ = 4 -Magnesium MgZ = 12 -Calcium CaZ = 20 -Strontium SrZ = 38 -Barium BaZ = 56 -The atomic number of Barium is the biggest. It is in the bottom of group 2. -In a group, the atomic number increases from top to bottom.
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Part - 2 3.Barium. Its atom contains more protons and neutrons. -In a group, the atomic mass increases from top to bottom. 4.Barium. Its mass increases with respect to its volume. http://www.chemicool.com/
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Part – 2Analyze 1.Elements of the same group: a)BoronB AluminumAl GalliumGa IndiumIn ThalliumTl b)HydrogenH LithiumLi SodiumNa PotassiumK RubidiumRb CesiumCs
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Part – 2 Analyze c)CarbonC siliconSi GermaniumGe TinSn(Stannum) LeadPb 2.Copper Cu, Silver Ag et Gold Au (aurum) Yes, they are in the same group, Group 11 (from the left to the right). Yes, because they are in the same column and they are the coinage metals (to make coins). 3.Platinum Pt is in group 10 (from the left to the right). Gold Au is in group 11. No, because they are precious metal.
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Part - 3 1.Elements of periods 2 and 3 Li BeBCNOFNe Na MgAlSiPSClAr 2.None of them appears in periods 2 and 3. The only liquid elements are: -Bromine Br, in period 4 -Mercury Hg (hydrargyrum), in period 6
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Part - 3 3.The gases : -Chlorine Cl is underneath Fluorine F. No, in period 4, 5… -Argon Ar is underneath Neon Ne. yes, inperiod 4, 5 et 6
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Part – 3 Analyze 1.The state of a substance (solid, liquid or gas) is a physical property. The Periodic Table is based on the chemical properties. -If one element in a group is a gas, the other elements of this group should notbe all gases. 2.a) The group number of halogens is 17. b) Mendeleev had found taht the chemical properties of Tellurium are different fromthe chemical properties of Iodine. Mendeleev put Iodine with the halogens because it has the same chemical properties of them.
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Groups names Group 1Alkali Metals Group 2Alkali Earth Metals Group 13Earth Metals Group 14Dracogens Group 15Pnictogens Group 16Chalcogens Group 17Halogens Group 18Noble gases
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