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5 Written Questions

5 Matching Questions

  1. Difference between compound and molecule?
  2. What's a positive ion called? A negative ion?
  3. What is a molecule?
  4. What are valence electrons?
  5. Difference between an element and a compound?
  1. a Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
  2. b Positive ion = CATION
    Negative ion = ANION
  3. c The electrons on the outermost orbital shell
  4. d 2 or more atoms held together by covalent bonds
  5. e 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.

5 Multiple Choice Questions

  1. Atoms that lose or gain electrons to complete their outer shell
  2. One atom's attraction of the electrons within one covalently bonded molecule
    O > N > C > H
    Oxygen - most electronegative element
  3. Two or more atoms SHARING ELECTRONS.
    Single covalent bonds - sharing of one pair of valence electrons
    Double - sharing of two pairs of valence electrons
  4. Covalent bonds (STRONGEST) and Ionic bonds.
  5. 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 True/False Questions

  1. What is a chemical reaction? Be able to identify the products and reactants in a chemical reaction.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. Choose 2 elements essential to life, draw the electron configuration of each as an ion and note the charge of the ion.Ex: O - only 6 rings on outer shell, so it wants to gain 2, making it 2- charge


  3. What is an element?A substance that cannot be broken down to other substances by chemical reactions.


  4. Define Subatomic particles, their charges, where they're found, and their relative mass.Potential energy - stored energy due to location or structure; ready to use energy
    Kinetic energy - energy in motion or movement; currently using


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


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