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Explore the three main groups on the periodic table - Metals, Nonmetals, and Metalloids (Semi-Conductors). Discover the characteristics, properties, and applications of each group, including Alkali Metals, Alkaline Earth Metals, Transition Metals, Lanthanides, Actinides, Halogens, and Noble Gases. Learn about their reactivity, valence electrons, and unique features.
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Periodic Table Groups Ch.19, Sec.1
Groups • 3 main groups: • Metals • Nonmetals • Metalloids (Semi-Conductors)
Metals • Middle and left of table • Conductors • Shiny solids • Malleable (bendable)
Special Metal Groups • Alkali Metals • Alkaline Earth Metals • Transition Metals • Lanthanides • Actinides
Alkali Metals • Group (column) 1 • Very reactive • 1 valence e- • +1 cation • In nature as compounds • Ex: NaCl (salt)
Alkaline Earth Metals • Group 2 • 2 valence e- • +2 cations • Useful to humans
Transition Metals • Groups 3-12 • Not as reactive • Cations • Useful metals
Lanthanides • Part of transition metals • Period 6 - below rest of table
Actinides • Part of transition metals • Period 7 - below rest of table
Nonmetals • Right side of table except for Hydrogen • Solid, liquid, or gas • Dull, brittle, and nonconductors
Special Nonmetal Groups • Halogens • Noble Gases
Halogens • Group 17 • Very reactive • 7 valence e- • -1 anions • Most compounds
Noble Gases • Group 18 • Full outer shells • Unreactive
Metalloids / Semiconductors • On “zig-zag” • Nonmetals that can conduct • Ex: silicon - used in computers