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5 Written questions

5 Matching questions

  1. Difference between covalent and ionic bonds?
  2. Are Van der Waals interactions weak or strong?
  3. What are trace elements?
  4. What are non-polar covalent bonds?
  5. What are polar covalent bonds?
  1. a The sharing of electrons UNEQUALLY; atoms have differing electronegativities
  2. b Weak.
  3. c Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter
  4. d Covalent bonds are the SHARING of electrons, whether it be equally or unequally
    Ionic bonds are the GAINING or LOSING of electrons, NOT SHARING
  5. e The sharing of electrons EQUALLY; atoms have similar electronegativities

5 Multiple choice questions

  1. The making and breaking of chemical bonds.
    1. Reactants - structure of chemicals prior to a chemical reaction
    2. Reaction
    3. Products - structure of chemicals as a result of a chemical reaction
  2. Atoms that lose or gain electrons to complete their outer shell
  3. Different forms of the same element; they differ in number of neutrons, but they have the same # of protons and behave identically in chemical reactions
  4. First shell - 2
    Second shell - 8
    Third shell - 8
  5. Potential energy - stored energy due to location or structure; ready to use energy
    Kinetic energy - energy in motion or movement; currently using

5 True/False questions

  1. What is the atomic mass?The number of protons and neutrons in nucleus.

          

  2. What is the atomic number?The number of protons and neutrons in nucleus.

          

  3. What bond does a SINGLE molecule of water have? (H₂O)Polar covalent bond.
    (it's when there's more than one polar molecule that hydrogen bonding takes place)

          

  4. What are ionic bonds?Electron gaining or losing; e⁻ TRANSFER (NOT SHARING) between two atoms

          

  5. What is a molecule?a substance consisting of two or more different elements combined in a fixed ratio.

          

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