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Periods in periodic table

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  • Elements in which period have valence electrons in the 7s, 5f, 6d and 7p orbitals.
    Period 7
  • Elements of same group have similar properties?
    They have similar physical and chemical properties.
  • Say one trend in periodic table.
    electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character
  • Elements in 3 period typically follow the so-called -
    octet rule
  • What is period in periodic table?
    horizontal rows
  • The first period conatains which elements?
    hydrogen and helium
  • How many groups period in periodic table?
    18 groups
  • What is the state of sodium in 20*C?
    solid
  • What are the rare earth element?
    Lanthanides
  • What is the potassium's group name(special name).
    alkali metal, lithium family
  • How many trends in periodic table?
    electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character
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