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Published byEgbert Watts Modified over 9 years ago
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Essential Question: How are the elements organized? THE PERIODIC TABLE
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Dmitri MendeleyevAlkali Periodic TableAlkaline earth PeriodTransition Group/FamilyHalogens Noble gases Metals Nonmetals Metalloids VOCABULARY
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Families of the Periodic Table CONCEPT
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Russian chemist who first tried to classify elements based on their properties. His table was ordered by atomic MASS (which has been changed today). DMITRI MENDELEYEV
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Chart that organizes information about the elements. Each box contains: Chemical symbol, Atomic Mass, and Atomic Number. Today is organized by Atomic NUMBER. PERIODIC TABLE
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Horizontal Rows on the periodic table. Numbered 1-7. PERIOD
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Also called: FAMILY Vertical columns on the periodic table. Elements in same group/family have similar properties. GROUP
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Left of step-like line. Shiny luster. Malleable – made into thin sheets. Ductile – stretched into wires. Solid. Conduct heat & electricity. METALS
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Group 1. Most reactive metals – combine with other elements. ALKALI METALS Sodium
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Group 2. Also very reactive elements. ALKALINE EARTH METALS Magnesium
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Groups 3-12. Give off characteristic colors. TRANSITION METALS Transition Metals
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Along step-like line. Some characteristics of metals AND nonmetals. METALLOIDS Metalloids Silicon
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Right of step-like line. Dull. Not conductors. Gases or solids. NONMETALS
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Group 17. Most reactive nonmetals. Halogens + Alkali metals = Salts. HALOGENS
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Group 18. Least reactive. Inert – do not react naturally. NOBLE GASES
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