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5 Written Questions

5 Multiple Choice Questions

  1. Strong 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
  2. changes temperature very slowlyare stable in response to temperature changes of the surrounding air


    *when sweat evaporates, a large amount of heat is taken with it and cools your body
  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. the chemical bond that forms when electrons between atoms are shared
    occurs when electronegatives are similar
  5. water expands [because water molecules are kept seperated], and becomes less dense
    floats in liquid water

5 True/False Questions

  1. Atomconsists of a nucleus of positively charged protons and neutrally charged neuron

          

  2. electronegativityweak 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

          

  3. Ionsatoms that have positive or negative charges

          

  4. Water -- AdhesionAdhesion is the attraction between the unlike substances
    demonstrates capillary action

          

  5. Ionic bondsthe chemical bond that forms between two atoms when one or more electrons are transformed from one atom to anohter.
    happens when the electronegatives differ
    creates ions

          

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