8th Prop of Atoms & Molecules L 1-15 Vocab Crossword

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Across
  1. 2. substance that cannot be broken down by ordinary chemical means
  2. 5. bond formed when thousands of atoms freely share their electrons
  3. 7. a bond formed by transferring of electrons
  4. 14. gases elements in column VIIA, (18) non-reactive elements
  5. 15. removal of oxygen from a molecule
  6. 18. a measure of how strongly an element attracts electrons to itself
  7. 19. two of the same type of atom bonded together
  8. 21. positively charged particle (+) in the nucleus of an atom
  9. 22. number of protons in an atom
  10. 25. column of the periodic table
  11. 26. non-reactive
  12. 28. recycling of carbon for reuse by plants and animals
  13. 30. row of the periodic table
  14. 31. substance whose atoms form in an orderly pattern
Down
  1. 1. elements on the periodic table between the metals and nonmetals
  2. 3. negatively charged particle orbiting the nucleus of an atom
  3. 4. an element with an electrical charge due to missing or extra electrons
  4. 6. symbolic representation of the atoms in a molecule
  5. 8. molecules formed by sharing of electrons
  6. 9. top four elements in column VIIA (17) on the periodic table
  7. 10. refining ore through high temperature
  8. 11. number of protons plus the number of neutrons in an atom
  9. 12. separating of atoms by passing electrical current through them
  10. 13. electrically neutral (neither + nor - )in the nucleus of an atom
  11. 16. group of chemically connected atoms
  12. 17. metal that results when a small amount of one metal is added to another
  13. 20. adding of oxygen to a molecule
  14. 23. two or more different kinds of atoms bonded together
  15. 24. outermost energy level (or shell) of an atom
  16. 27. elements in the center columns of the periodic table, labeled with the letter B
  17. 29. tight mass of protons and neutrons in the center of an atom