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TOPIC: Metals vs Nonmetals Do Now: Take three different crayons Take out unit packet

TOPIC: Metals vs Nonmetals Do Now: Take three different crayons Take out unit packet. Classifying the Elements. 2/3 (75%) of elements are metals Remaining elements: non-metals & metalloids (semi-metals) Metalloids: some properties of metals & some properties of nonmetals Staircase:

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TOPIC: Metals vs Nonmetals Do Now: Take three different crayons Take out unit packet

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  1. TOPIC: Metals vs NonmetalsDo Now: Take three different crayonsTake out unit packet

  2. Classifying the Elements • 2/3 (75%) of elements are metals • Remaining elements: non-metals & metalloids (semi-metals) • Metalloids: • some properties of metals & some properties of nonmetals • Staircase: • dividing line between metals & nonmetals • elements to left are metals (except H) • elements to right are non-metals

  3. Properties of Metals • Malleable – flattened into sheets • Ductile – drawn into wires & tubes • have Luster • Good Conductors of heat & electricity • Solid at room temperature (except Hg) • Metals lose electrons & form positive ions “Metals are losers” • Most reactive metal is Fr • Most reactive family is Alkali Metals

  4. DO YOU BELIEVE ME

  5. So…metals don’t want electrons, they want to get rid of them

  6. Properties of Nonmetals • generally gases or solids (except Br2) • solids are Brittle • solids are Dull • poor conductors of heat & electricity • Nonmetalsgain electrons & form negative ions “Nonmetals are winners” • Most reactive nonmetal is F • Properties: OPPOSITE of metals

  7. So…nonmetals love electrons, they want to take electrons

  8. Properties of Metalloids 7 metalloids: • 5 on right of staircase: B,Si,As,Te,At • 2 on left of staircase: Ge,Sb Each metalloid has some metallic and some nonmetallic properties • Example:Si • shiny like metal but brittle like nonmetal

  9. Most elements are solid at room temperature • GASES • Elements that are gases at STPDiatomics:H2, N2, O2, F2, Cl2 • Monatomics: noble gases He, Ne, Ar, Kr, Xe, Rn • Liquids (only 2 at room temp.) • Br2 (non-metal) and Hg (metal)

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