Unit 1: Periodic Table Crossword

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Across
  1. 3. negatively charged subatomic particle located in the orbitals of the atom.
  2. 4. the columns of the periodic table
  3. 5. positively charged subatomic particle located in the center of the atom.
  4. 7. Li, Na, K, Rb, Cs, Fr family name
  5. 8. the rows of the periodic table
  6. 9. has 38 protons
  7. 10. atoms of the same element but at different weights (protons & neutrons)
  8. 12. the amount of energy needed to cause atoms to lose electrons; used to describe reactivity for metals
  9. 16. the mass of the subatomic particles combined within an atom.
  10. 19. neutral subatomic particle located in the center of the atom.
  11. 20. electrons located on the outermost orbital of an atom (can be exchanged)
  12. 21. has an atomic mass of 54.94
  13. 22. the average mass of all isotopes of an element on Earth.
Down
  1. 1. the ability for atoms to gain electrons; used to describe reactivity for nonmetals
  2. 2. the size of the atom; largest is francium.
  3. 6. atoms of the same element but different charges (protons & electrons)
  4. 8. a tool used by chemists to organize the elements of the world
  5. 11. symbol is Pb
  6. 13. element #18
  7. 14. a type of element that is more likely to lose electrons
  8. 15. theoretical "rings" around the atom to determine possible locations of electrons.
  9. 17. has 41 electrons when neutral
  10. 18. a type of element that is more likely to gain electrons