Periodic Table Basics

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Across
  1. 1. Symbol for sodium
  2. 3. Metal liquid at room temperature
  3. 5. Vertical columns in the periodic table
Down
  1. 1. Group 18 elements are called ____ gases
  2. 2. Element with atomic number 1
  3. 4. Element in bones and shells
  4. 6. Horizontal rows in the periodic table