Chemistry

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Across
  1. 3. Metals ______ electrons when forming ions
  2. 4. The outermost shell of an atom
  3. 5. A negatively charged ion
  4. 8. Another term for electron shell
  5. 9. This element is represented by the symbol W
  6. 13. This element is found in group 17, period 4
  7. 14. A positively charged subatomic particle
  8. 16. Protons and neutrons are found here
  9. 17. This value tells you how many protons are in an element
  10. 18. A row on the periodic table
Down
  1. 1. Non-metals ______ electrons when forming ions
  2. 2. A negatively charged subatomic particle
  3. 6. An atom that has lost or gained electrons
  4. 7. An atom of the same element with a different number of neutrons
  5. 10. The element represented by atomic #74
  6. 11. The smallest unit of matter
  7. 12. A column on the periodic table
  8. 15. A positively charged ion