Periodic Trends Crossword

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Across
  1. 3. This scientist organized the periodic table by atomic number.
  2. 7. A negatively charged particle.
  3. 10. An atom that has gained electrons and has a negative charge.
  4. 12. A positively charged particle.
  5. 13. This type of element conducts electricity, has luster, and is malleable.
  6. 15. The type of metal that makes up the d orbital.
  7. 16. The most reactive nonmetal group.
  8. 18. The most reactive metal group.
  9. 19. The name of the rows on the periodic table.
  10. 20. The ability of an atom to attract electrons.
Down
  1. 1. The ability of an element to undergo a chemical change.
  2. 2. This scientist discovered the relationship between chemical and physical properties of elements and atomic mass.
  3. 3. This type of element has properties of both metals and nonmetals.
  4. 4. These elements make up the last row of the periodic table.
  5. 5. This type of electron is in the outermost energy level of an atom.
  6. 6. This type of element does not conduct electricity well, is dull, and brittle.
  7. 8. These elements make up the second to last row of the periodic table.
  8. 9. These gases are the most stable, containing 8 valence electrons.
  9. 11. This type of energy is the amount of energy required to remove a valence electron from an atom.
  10. 14. This scientist moved the lanthanides and actinides below the periodic table.
  11. 17. An atom that has lost electrons and has a positive charge.
  12. 21. The name of the columns on the periodic table.