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5 Written questions

5 Matching questions

  1. Reactants
  2. The nucleus of an atom contains...??
  3. Electron Shells
  4. Hydrogen Bonds
  5. Second shell of an atom can contain how many electrons?
  1. a Neutrons and protons.
  2. b A starting material in a chemical reaction.
  3. c A type of weak chemical bond formed when the partially positive hydrogen atom participating in a polar covalent bond in one molecule is attracted to the partially negative atom participating in a polar covalent bond in another molecule (or in another region of the same molecule).
  4. d 8
  5. e An energy level representing the distance of an electron from the nucleus of an atom.

5 Multiple choice questions

  1. A molecule containing polar covalent bonds and having an unequal distribution of charges.
  2. A covalent bond in which electrons are shared equally between two atoms of similar electronegativity.
  3. A substance that is dissolved in a solution.
  4. A covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electornegative atom, making it slightly negative and the other atom slightly positive.
  5. a substance consisting of two or more different elements combined in a fixed ratio.

5 True/False questions

  1. Aqueous SolutionA solution in which water is the solvent.

          

  2. IonAn atom or group of atoms that has gained or lost one or more electrongs, thus acquiring a charge.

          

  3. What 4 elements make up about 96% of living matter?The attraction of a given atom for the electrons of a covalent bond.

          

  4. Atomic NumberThe number of protons in each atom of a particular element.

          

  5. First shell of an atom can contain how many electrons?18