Bell ringer Compare & Contrast the properties of Metals, non-metals, and metalloids

Introducing the ten major groups (families) on the modern Periodic Table:

Hydrogen is not a member of this group. Alkali Metals potassium - soft, silver-white, shiny metals most reactive metals Hydrogen is not a member of this group. It is not a metal. reactivity increases

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Alkaline Earth Metals - not as reactive as alkali metals magnesium - not as reactive as alkali metals often mixed with Al forms strong/light weight alloys Steel (iron +carbon) Bronze (copper +tin ) Brass (copper + zinc)

Alkaline Earth Metals Magnesium Calcium Used to make steel bones & teeth Chalk, limestone, pearls, plaster

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Boron Family Boron Hard/brittle never found pure in nature in borax...used to make detergents & cosmetics

Boron Family 13 Al Aluminum 26.98 Aluminum most abundant metal in earth’s crust important metal for industry light, strong, slow to corrode 13 Al Aluminum 26.98

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Carbon Family Most compounds in body contain C silicon Most compounds in body contain C Si 2nd most abundant element in Earth’s crust Si used to tip saw blades

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Nitrogen Family N and P used in fertilizers P on tips of matches Arsenic N and P used in fertilizers P on tips of matches

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Oxygen Family O very abundant element S used in fertilizers sulfur Oxygen Family O very abundant element S used in fertilizers O needed for digestion

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Halogen Family (“salt-former”) -most active nonmetals -never found pure in nature -react with alkali metals easily (forms salts) -F most active halogen

F compounds in toothpaste Cl kills bacteria Halogens cont… bromine F compounds in toothpaste Cl kills bacteria I keeps thyroid gland working properly

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The Noble Gases (Inert Gases) Neon - non-reactive In “neon” lights -in earth’s atmosphere (less than 1%)

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Transition Metals ductile, malleable, conductors mercury Almost all solids at room temp (Hg exception) ductile, malleable, conductors Less Reactive than Groups 1 & 2

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Rare Earth Elements Lanthanide series (period 6) uranium Lanthanide series (period 6) Actinide Series (period 7) Separated from table to make easy to read/print silver, silvery-white, or gray metals. Conduct electricity radioactive

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