PERIODIC CROSSWORD

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Across
  1. 1. SMALLEST PARTICLE OF AN ELEMENT.
  2. 5. NUMBER OF PROTONS IN AN ATOM (2 WORDS)
  3. 6. MOVING LEFT TO RIGHT ACROSS THE PERIODIC TABLE, THE NUMBER OF ELECTRONS IN ATOMS _______
Down
  1. 1. NUMBER OF PROTONS AND NEUTRONS IN AN ATOM (2WORDS)
  2. 2. ELEMENTS ARE ARRANGED BY THE _________TABLE
  3. 3. MOVING LEFT TO RIGHT ACROSS THE PERIODIC TABLE, ATOMIC RADIUS
  4. 4. ATOMS HAVE THE SAME NUMBER OF PROTONS AND _______.