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5 Written questions

5 Matching questions

  1. What are isotopes?
  2. What is a molecule?
  3. What are polar covalent bonds?
  4. How many electrons does it take to fill the first orbital shell? The second? The third?
  5. What is the atomic number?
  1. a The number of protons in an atom.
  2. b 2 or more atoms held together by covalent bonds
  3. c 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. d First shell - 2
    Second shell - 8
    Third shell - 8
  5. e The sharing of electrons UNEQUALLY; atoms have differing electronegativities

5 Multiple choice questions

  1. CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur
  2. Electron gaining or losing; e⁻ TRANSFER (NOT SHARING) between two atoms
  3. Atoms that lose or gain electrons to complete their outer shell
  4. The electrons on the outermost orbital shell
  5. Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.

5 True/False questions

  1. What is the atomic mass?The number of protons in an atom.


  2. 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


  3. What is a chemical reaction? Be able to identify the products and reactants in a chemical reaction.Atoms interacting with each other to share, take, or give electrons.


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


  5. 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