Biology Chapter 2

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Across
  1. 3. compounds that will interact with water; "water loving"
  2. 4. anything that takes up space
  3. 6. rain whose pH level has been skewed toward the acidic side of the pH scale , with air pollution being the cause of this shift
  4. 7. compounds that do not interact with water; "water fearing"
  5. 10. one of three primary constituents of an atom, possessing no electrical charge and found in an atom's nucleus; isotopes are defined by the number of these in an atom
  6. 11. type of covalent bond in which electrons are shared equally between atoms
  7. 13. membrane-lined compartment that encloses the primary complement of DNA in eukaryotic cells
  8. 15. chemical bond that links an already covalently bonded hydrogen atom with a second, relatively electronegative atom
  9. 17. physiological systems that function to keep pH within normal limits
  10. 20. measure of the strength of attraction an atom has for electrons that are being shared in a covalent bond
  11. 24. measure of the quantity of matter in any given object
  12. 25. difference in electrical charge at ne end as opposed to the other
  13. 26. chemical bond in which atoms share pairs of electrons
  14. 29. mixture of two or more kinds of molecules, atoms, or ions that is uniform throughout
  15. 30. basic constituent of an atom, found in the nucleus of an atom; has a positive electrical charge; elements are defined by the number of these in their nucleus
  16. 31. number of protons in the nucleus of an atom; all elements are ordered on the periodic table by this
  17. 34. the amount of energy required to raise the temperature of a substance by one degree Celsius
Down
  1. 1. scale used in measuring the relative acidity of a substance
  2. 2. the process of chemical combination and rearrangement
  3. 5. what is doing the dissolving
  4. 8. strongly basic OH- ion, often used to shift solutions toward neutral or basic on the pH scale
  5. 9. type of covalent bond in which electrons are shared unequally between atoms, so that one end of the molecule has a slight negative charge, and the other end a slight positive charge
  6. 12. states that matter is neither created nor destroyed in a chemical reaction
  7. 14. what is being dissolved
  8. 16. compounds made up solely of hydrogen and carbon atoms
  9. 18. one of three basic constituents of an atom; carry a negative electrical charge and are distributed in an atom a distance from the nucleus
  10. 19. chemical bonding in which two or more ions are linked by virtue of their opposite charge
  11. 21. collection of the atoms of two or more elements that have become linked through ionic bonding
  12. 22. a charged atom; an atom whose number of electrons differs from the number of protons
  13. 23. form of an element as defined by the number of neutrons contained in its nucleus
  14. 27. solution that is also known as basic
  15. 28. a substance that is "pure"; cannot be reduced to a simpler set of component substances through chemical processes
  16. 32. entity of consisting of a defined number of atoms covalently bonded together
  17. 33. any substance that accepts hydrogen ions in aqueous solution
  18. 35. any substance that yields hydrogen ions when put in aqueous solutions