Group properties

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  • Periodic table groups
    • Group 1 - Alkali Metals
      • Li, Na, K, Rb, Cs
      • Very reactive
      • Oxiides & hydroxides have general formula MO and MOH
      • Oxides and hydroxides very basic & dissolve in water to form alkaline solution
      • Reactivity increases DOWN the group
    • Group 2 - Alkaline earth metals
      • Mg, Ca, Sr, Ba
      • Less reactive than G1
      • Form basic oxides of formula MO2 and M(OH)2
      • Oxides and hydroxides only sparingly soluble in water but do form basic solutions
    • Transition Metals
      • Less reactive than G1 and 2
      • Oxides and hydroxides less strongly basic and are INSOLUBLE
    • Noble Gases
      • Ne, Ar, Kr, Xe
      • Present in air
      • Least reactive of the elements
    • The Halogens
      • F, Cl, Br, I
      • Very reactive, non-metallic
      • React with metals to form salts
    • Group 6
      • O, S, Se, Te
      • Ability to form 2 chemical bonds
      • Increase in metallic character from O - Te
    • Group 5
      • N, P, As, Sb, Bi
      • Form 3 or 5 chemical bonds
      • Gradation of metallic properties from N - Bi
    • Group 4
      • C, Si, Ge, Sn, Pb
      • Ability to form 4 chemical bonds
      • Gradation in metallic properties Pb-C
    • Group 3
      • B, Al, Ga, In, Ti
      • From ions with charge +3
      • B mettaloid
      • Rest are metals

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