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20 first elements of the periodic table

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  • O
    Oxygen
  • N
    Nitrogen
  • Ar
    Argon
  • B
    Boron
  • Mg
    Magnesium
  • P
    Phosphorus
  • Cl
    Chlorine
  • Ne
    Neon
  • Ca
    Calcium
  • Li
    Lithium
  • He
    Helium
  • Be
    Beryllium
  • Al
    Aluminium
  • C
    Carbon
  • S
    Sulfur
  • Na
    Sodium
  • F
    Fluorine
  • Si
    Silicon
  • K
    Potassium
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