Periodic table

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123456789101112131415
Across
  1. 4. The name for elements in group 1
  2. 8. The horizontal rows on the periodic table
  3. 9. The smallest part of an element that exists
  4. 10. The positive atoms in the nucleus
  5. 11. The neutral atoms in the nucleus
  6. 15. A substance made of only one type of atom
Down
  1. 1. The name of the man who formed the atomic theory of matter in 1803
  2. 2. The name for elements in group 0
  3. 3. The vertical columns in the periodic table
  4. 5. The number found at the top left of each chemical elements
  5. 6. A combination of two or more elements which are not chemically combined
  6. 7. something that is composed of two or more elements chemically joined together
  7. 12. name for elements in group 7
  8. 13. The negative atoms in the nucleus
  9. 14. the number of elements on the periodic table that are naturally occurring