The Periodic Table and its Trends

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Across
  1. 3. sum of all the protons and neutrons in an atom
  2. 6. electrons in the outermost energy level of an atom
  3. 8. This family is unreactive
  4. 11. Same amount of subatomic particles except for neutrons
  5. 12. number of protons in an atom
  6. 14. These are located in the left side of the periodic table
  7. 15. A negatively charged ion
  8. 16. Atom that gained or lost electrons
Down
  1. 1. These are located in the right side of the periodic table
  2. 2. Subatomic particles that are negative
  3. 4. A positively charged ion
  4. 5. These are located in at the staircase on the periodic table
  5. 7. Subatomic particles that is neutral
  6. 9. the simplest form of a pure substance
  7. 10. Subatomic particles that are positive
  8. 13. Center part of an atom containing subatomic particles