Periodic Table Review

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Across
  1. 3. An f block family of metals in period 6 with very large densities
  2. 8. The atomic ____ is calculated by adding the number of protons and neutrons.
  3. 9. Area of mathematical probability where an electron might be found. Come in varieties s, p, d, and f.
  4. 10. Class of elements on the right side of the periodic table that are defined by their brittle, dull nature.
  5. 14. Reactive nonmetals that form salt when combined with alkali metals
  6. 15. Type of atom with a different number of neutrons, giving the atom a different atomic mass.
  7. 16. Negatively charged subatomic particle found in rings orbiting the nucleus.
  8. 17. F block family of metals that are all radioactive.
  9. 19. Class of elements found on the "staircase" of the periodic table that exhibit properties of both metals and nonmetals
  10. 21. Positively charged subatomic particle, the number of which is equivalent to the atomic number
Down
  1. 1. Electrons farthest from the nucleus. Found in the outermost shell of an atom
  2. 2. Neutrally charged subatomic particle there to stabilize the nucleus of the atom.
  3. 4. Type of metal readily found in on Earth
  4. 5. An atomic ____ is equivalent to the number of protons and is unique to the atom.
  5. 6. Group 18 is named the ___ gases
  6. 7. Type of low density, low melting point, highly reactive metal found in group 1.
  7. 11. Columns on the periodic table
  8. 12. Electrons found closer to the nucleus in energy levels below the highest.
  9. 13. Class of elements on the left side of the periodic table; defined by their good conductivity, shiny luster, and malleability
  10. 18. Rows on the periodic table
  11. 20. Type of atoms with a different number of electrons, giving the atom a charge.