Periodic Table

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123456789101112131415161718
Across
  1. 3. element to the right of nickel
  2. 5. element with the atomic mass 35.453
  3. 7. element with the chemical symbol K.
  4. 11. element named after a planet
  5. 12. an element with the atomic number 47
  6. 13. the number of elements in the periodic table.
  7. 15. the periodic ______.
  8. 16. another particle that exists in the nucleus of an atom
  9. 18. element to the left of cobalt
Down
  1. 1. an element below silver
  2. 2. positively charged particles in an atoms nucleus
  3. 4. element with the chemical symbol Na
  4. 5. symbol an element goes by
  5. 6. the smallest particle that can still be considered an element
  6. 8. element with the atomic number 18
  7. 9. an isotope is identified by its ______.
  8. 10. the elements are organized by their atomic _______.
  9. 14. an atom with the same number of protons and different numbers of neutrons.
  10. 17. element with the atomic number 28