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5 Written questions

5 Matching questions

  1. How many electrons does it take to fill the first orbital shell? The second? The third?
  2. What are polar covalent bonds?
  3. What is a molecule?
  4. What is a chemical reaction? Be able to identify the products and reactants in a chemical reaction.
  5. What are our 6 Essential Elements?
  1. a CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur
  2. b First shell - 2
    Second shell - 8
    Third shell - 8
  3. c 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. d 2 or more atoms held together by covalent bonds
  5. e The sharing of electrons UNEQUALLY; atoms have differing electronegativities

5 Multiple choice questions

  1. Polar covalent bond.
    (it's when there's more than one polar molecule that hydrogen bonding takes place)
  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. Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
  4. Positive ion = CATION
    Negative ion = ANION
  5. 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 True/False questions

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


  2. What is a hydrogen bond? Strong or weak?Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.


  3. What are trace elements?A substance that cannot be broken down to other substances by chemical reactions.


  4. Define the potential energy level of electrons and the Kinetic energy level.Potential energy - stored energy due to location or structure; ready to use energy
    Kinetic energy - energy in motion or movement; currently using


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