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5 Written questions

5 Matching questions

  1. Choose 2 elements essential to life, draw the electron configuration of each as an ion and note the charge of the ion.
  2. What is a molecule?
  3. What are isotopes?
  4. What is a hydrogen bond? Strong or weak?
  5. What are our 6 Essential Elements?
  1. a 2 or more atoms held together by covalent bonds
  2. b CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur
  3. c Ex: O - only 6 rings on outer shell, so it wants to gain 2, making it 2- charge
  4. d 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
  5. e Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.

5 Multiple choice questions

  1. The sharing of electrons EQUALLY; atoms have similar electronegativities
  2. A compound has characteristics different from those of its elements. Table salt, for example, is sodium chloride (NaCl), a compound composed of the elements sodium (Na) and chlorine (Cl) in a 1:1 ratio. Pure sodium is a metal, and pure chlorine is a poisonous gas. When chemically combined, however, sodium and chlorine form an edible compound.
  3. Potential energy - stored energy due to location or structure; ready to use energy
    Kinetic energy - energy in motion or movement; currently using
  4. First shell - 2
    Second shell - 8
    Third shell - 8
  5. A substance that cannot be broken down to other substances by chemical reactions.

5 True/False questions

  1. What are polar covalent bonds?The sharing of electrons UNEQUALLY; atoms have differing electronegativities


  2. What are the two strong chemical bonds?Atoms interacting with each other to share, take, or give electrons.


  3. What is matter?Anything that takes up space and has mass. Ex: Air; something that isn't matter: light (think of the filling up a balloon metaphor)


  4. What are covalent bonds? Single? Double?The electrons on the outermost orbital shell


  5. Difference between covalent and ionic bonds?Covalent bonds are the SHARING of electrons, whether it be equally or unequally
    Ionic bonds are the GAINING or LOSING of electrons, NOT SHARING


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