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5 Written Questions

5 Multiple Choice Questions

  1. two or more atoms held together by chemical bonds
  2. water expands [because water molecules are kept seperated], and becomes less dense
    floats in liquid water
  3. weak bonds between molecules
    form when H+ is in a covalent bond, but is attracted to another molecule [usually with a high electronegativity] in another covalently bonded molecule
  4. atoms that have positive or negative charges
  5. consists of a nucleus of positively charged protons and neutrally charged neuron

5 True/False Questions

  1. Water -- Adhesionionic and polar substances dissolve in the water.
    hydrophillic vs hydrophobic

          

  2. Water -- Cohesion/Surface TensionStrong cohesion [attraction between water molecules]
    occurs because of hydrogen bonding
    High Surface Tension -- creates a water surface that is firm enough to allow insects to walk upon it

          

  3. polar covalent bondwhen electrons are shared equally
    electronegativities are equal

          

  4. Covalent Bondthe chemical bond that forms when electrons between atoms are shared
    occurs when electronegatives are similar

          

  5. Properties of Water1. Universal Solvent
    2. High Heat Capacity
    3. Ice
    4. Strong Cohesion/High Surface Tension
    5. Adhesion

          

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