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5 Written questions

5 Matching questions

  1. What is an element?
  2. What is matter?
  3. What is a chemical bond?
  4. What is the atomic number?
  5. What is a hydrogen bond? Strong or weak?
  1. a A substance that cannot be broken down to other substances by chemical reactions.
  2. b The number of protons in an atom.
  3. c Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.
  4. d Anything that takes up space and has mass. Ex: Air; something that isn't matter: light (think of the filling up a balloon metaphor)
  5. e Atoms interacting with each other to share, take, or give electrons.

5 Multiple choice questions

  1. The electrons on the outermost orbital shell
  2. 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. Atoms that lose or gain electrons to complete their outer shell
  4. 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
  5. 2 or more atoms held together by covalent bonds

5 True/False questions

  1. Do Hydrogen Bonds only occur with water molecules?No! Example: NH₃ (ammonia) is a hydrogen bond, the partial negative of Nitrogen bonds with the partial positive of Hydrogen.


  2. Difference between an element and a compound?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. What are isotopes?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. 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 electronegativity?The number of protons and neutrons in nucleus.


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