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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 isotopes?
  3. What are trace elements?
  4. What is the atomic mass?
  5. What's a positive ion called? A negative ion?
  1. a 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
  2. b Positive ion = CATION
    Negative ion = ANION
  3. c First shell - 2
    Second shell - 8
    Third shell - 8
  4. d Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter
  5. e The number of protons and neutrons in nucleus.

5 Multiple choice questions

  1. 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. No! Example: NH₃ (ammonia) is a hydrogen bond, the partial negative of Nitrogen bonds with the partial positive of Hydrogen.
  3. Weak.
  4. The number of protons in an atom.
  5. The electrons on the outermost orbital shell

5 True/False questions

  1. 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

          

  2. What is a compound?a substance consisting of two or more different elements combined in a fixed ratio.

          

  3. What is electronegativity?One atom's attraction of the electrons within one covalently bonded molecule
    O > N > C > H
    Oxygen - most electronegative element

          

  4. What is an element?Atoms that lose or gain electrons to complete their outer shell

          

  5. What are polar covalent bonds?The sharing of electrons UNEQUALLY; atoms have differing electronegativities

          

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