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5 Written questions

5 Matching questions

  1. What is a compound?
  2. What are polar covalent bonds?
  3. What is matter?
  4. What bond does a SINGLE molecule of water have? (H₂O)
  5. Are Van der Waals interactions weak or strong?
  1. a Anything that takes up space and has mass. Ex: Air; something that isn't matter: light (think of the filling up a balloon metaphor)
  2. b a substance consisting of two or more different elements combined in a fixed ratio.
  3. c Polar covalent bond.
    (it's when there's more than one polar molecule that hydrogen bonding takes place)
  4. d Weak.
  5. e The sharing of electrons UNEQUALLY; atoms have differing electronegativities

5 Multiple choice questions

  1. No! Example: NH₃ (ammonia) is a hydrogen bond, the partial negative of Nitrogen bonds with the partial positive of Hydrogen.
  2. First shell - 2
    Second shell - 8
    Third shell - 8
  3. 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.
  4. Covalent bonds (STRONGEST) and Ionic bonds.
  5. The electrons on the outermost orbital shell

5 True/False questions

  1. What is a hydrogen bond? Strong or weak?Two or more atoms SHARING ELECTRONS.
    Single covalent bonds - sharing of one pair of valence electrons
    Double - sharing of two pairs of valence electrons

          

  2. What are covalent bonds? Single? Double?Two or more atoms SHARING ELECTRONS.
    Single covalent bonds - sharing of one pair of valence electrons
    Double - sharing of two pairs of valence electrons

          

  3. 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

          

  4. 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

          

  5. Define Subatomic particles, their charges, where they're found, and their relative mass.Protons - positive; in nucleus; 1 dalton (or amu)
    Neutrons - neutral; in nucleus; 1 dalton (or amu)
    Electrons - negative; found outside nucleus; 0 nothing

          

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