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5 Written Questions

5 Matching Questions

  1. Difference between compound and molecule?
  2. What is the atomic number?
  3. What's a positive ion called? A negative ion?
  4. What is a compound?
  5. What are polar covalent bonds?
  1. a The sharing of electrons UNEQUALLY; atoms have differing electronegativities
  2. b a substance consisting of two or more different elements combined in a fixed ratio.
  3. c Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
  4. d Positive ion = CATION
    Negative ion = ANION
  5. e The number of protons in an atom.

5 Multiple Choice Questions

  1. Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter
  2. The sharing of electrons EQUALLY; atoms have similar electronegativities
  3. Ex: O - only 6 rings on outer shell, so it wants to gain 2, making it 2- charge
  4. 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. No! Example: NH₃ (ammonia) is a hydrogen bond, the partial negative of Nitrogen bonds with the partial positive of Hydrogen.

5 True/False Questions

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


  2. What are valence electrons?The electrons on the outermost orbital shell


  3. 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


  4. What bond do two oxygen's share?Non-polar covalent bond; they have equal electronegativity so they share their e⁻


  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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