Chapter 2 Page 2 Study tool

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Across
  1. 2. must have 8 electrons in valence shell to be stable except H and He
  2. 6. substances that ionize in water and form solutions that can conduct electricity
  3. 8. 17 protons and 16 electrons
  4. 9. A vitamin that is an antioxidant
  5. 10. negatively charged and made by gaining an electron
  6. 11. example of an antioxidant
  7. 13. Atoms with unequal numbers of protons and electrons
  8. 14. neutralize free radicals
  9. 15. charged particles with unequal numbers of protons and electrons
  10. 16. chemical particles with an odd number of electrons
  11. 17. O2- oxygen gas- covalent bond Molecule or Compound?
  12. 18. chemical particle composed of two or more atoms united by a chemical covalent bond
  13. 19. Two or more different atoms joined by an ionic or covalent bond
Down
  1. 1. identifies types and numbers of each element present (ingredients)
  2. 3. molecules with the exact same molecular formula BUT atoms are in a different arrangement
  3. 4. outermost shell
  4. 5. dangerous because they destroy healthy molecules by changing them into them
  5. 7. positively charged and made by losing an electron
  6. 10. 16 protons and 17 electrons
  7. 12. C6H12O6- glucose- covalent bonds Molecule or Compound?