Particles Review

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Across
  1. 4. diffusion of water
  2. 6. energy for respiration
  3. 7. osmosis is the diffusion of this substance
  4. 8. the number of electrons in a neutral atom is equal to the number of ____
  5. 12. semi-conductors found along the stairstep on the periodic table
  6. 13. poor conductors, good insulators, often gases, found on the right side of the periodic table
  7. 14. molecule made of two atoms
  8. 17. tells us the amount of protons in an atom
  9. 18. highly reactive metals because they have one valence electron
  10. 21. when particles move from high to low concentration without requiring energy
  11. 23. charge of an electron
Down
  1. 1. where the protons and neutrons of an atom are found
  2. 2. is the combined mass of protons and neutrons
  3. 3. what water must pass across for osmosis to occur
  4. 5. a membrane that allows smaller molecules to pass, but not larger ones
  5. 9. elements that are nonreactive in nature with a full valence electron shell
  6. 10. greenhouse gas taken in by plants during photosyntheis
  7. 11. the force that holds molecules together
  8. 15. molecule made of two different types of atoms
  9. 16. often good conductors, lustrous, malleable, and possibly ductile
  10. 19. made of three types of subatomic particles
  11. 20. contents that contain a variety of non-bonded molecules
  12. 22. an atom with a charge due to unequal number of protons and electrons