• Y 7 Periodic table
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  • The vertical (up and down) columns in the Periodic Table are called? groups- towers - periods - atomic numbers
    groups
  • What is the name of group number 1? halogens - noble gases - alkali metals - alkaline earth metals
    alkali metals
  • how many elements in the modern periodic table ? 100 - 181 - 117 -118
    118
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