Periodic Table Trends

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Across
  1. 3. Spherical energy levels around an atom in which electrons reside.
  2. 6. The energy required to remove an electron from an atom in the gas phase.
  3. 8. An element with only three shells and three valence electrons
  4. 11. The most electronegative atom on the periodic table.
  5. 12. Energy _____ as you move farther from the nucleus.
  6. 13. The strength with which an atom pulls on electrons in a bond or on a nearby atom.
  7. 16. An ion with a negative charge.
  8. 17. A measure of the atom's size.
Down
  1. 1. A Noble Gas with four electron shells
  2. 2. Electrons in the outermost energy level of an atom.
  3. 4. Number of valence electrons carbon has.
  4. 5. Radius decreases moving right due to increase in number of ______.
  5. 6. An atom that has gained or lost electrons.
  6. 7. An element family with atoms that have seven valence electrons
  7. 9. An ion with a positive charge.
  8. 10. The atom on the periodic table with the highest ionization energy.
  9. 11. The radioactive atom with the largest atomic radius on the periodic table.
  10. 14. Number of valence electrons Noble Gasses have.
  11. 15. Elements that form 1+ ions