Atomic Structure and Periodic Trends (for words with spaces, use -)

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Across
  1. 3. name for group 2 on the periodic table
  2. 5. elements on or near the staircase known for conducting electricity only when excited enough.
  3. 6. how strong the pull from an atom's nucleus is
  4. 7. most of the elements are this type of material. Left of the staircase and known for its qualities of shininess, conductivity, and ability to be stretched into a wire.
  5. 9. an atom with a positive charge after losing electrons
  6. 10. after removing a valence electron from an atom, removing another will require ____ energy
  7. 14. physical property of metals meaning the same thing as "shininess."
  8. 16. guy who changed the periodic table to be organized by atomic number instead
  9. 17. amount of energy needed to remove an electron from an atom
  10. 20. tendency for an element to attract electrons when chemically combined to another element
  11. 21. vertical (^ and v) column on periodic table
  12. 22. when a neutral atom loses electrons and becomes a cation, it becomes _______
  13. 23. guy who organized elements on the periodic table by atomic mass
  14. 25. when an atom's inner electrons shield others from their atom's nuclear attraction
Down
  1. 1. horizontal (< and >) row on periodic table
  2. 2. 17th group on the periodic table
  3. 4. name for group 1 on the periodic table
  4. 5. quality of being able to be hammered into a thin sheet
  5. 8. part of the atom where electrons are
  6. 11. quality of being able to be stretched into a thin wire
  7. 12. an atom with a negative charge after gaining electrons
  8. 13. central part of the atom containing protons and neutrons
  9. 15. elements to the right of the staircase known for being good insulators, their brittleness, and dullness.
  10. 18. also known as the size of an atom
  11. 19. when a neutral atom gains electrons and becomes an anion, it becomes ______
  12. 24. 18th group on the periodic table