First semester final crossword

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Across
  1. 3. The type of bond that takes place between metals and nonmetals.
  2. 5. Which particle has a neutral charge?
  3. 6. The ___ group tells us the number of valence electrons an element has.
  4. 12. The dots found on orbitals going around the nucleus of an atom are called...
  5. 13. The type of bond responsible for surface tension
  6. 18. Anything that has mass and takes up space
  7. 19. What is defined as "An atom's ability to attract and bond with other atoms"?
Down
  1. 1. The center of the atom is called the...
  2. 2. When an atom has a negative charge it is called an...
  3. 4. The type of bond that takes place between only nonmetals
  4. 7. An element with a positive charge is called a...
  5. 8. When drawing Bohr models, the first orbital can hold up to ___ electrons.
  6. 9. If an element has more protons than electrons, the charge will be...
  7. 10. Who created the periodic table used today?
  8. 11. What charge do all compounds want to have?
  9. 14. The rule that tells us that elements have a tendency to want 8 valence electrons.
  10. 15. What element is found on the fourth period and second group?
  11. 16. The columns of the periodic table are called...
  12. 17. What is defined as "The building block for all of matter"?
  13. 20. The state of matter that has an undefined shape and an undefined volume