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5 Written questions

5 Matching questions

  1. Third shell of an atom can contain how many electrons?
  2. Salt
  3. Proton
  4. The nucleus of an atom contains...??
  5. Electronegativity
  1. a 8
  2. b Neutrons and protons.
  3. c The attraction of a given atom for the electrons of a covalent bond.
  4. d A compound resulting from the formation of ionic bonds; also called an ionic compound.
  5. e A subatomic particle with a single positive electrical charge, found in the nucleus of an atom.

5 Multiple choice questions

  1. Rain, snow or fog that is more acidic than pH 5.2.
  2. 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).
  3. A chemical substance that resists changes in pH by accepting hydrogen ions from or donating hydrogen ions to solutions.

    substance that minimize changes in pH.
  4. A molecule containing polar covalent bonds and having an unequal distribution of charges.
  5. The total mass of an atom; also called atomic weight. Given as a whole number, the atomic mass approximately equals the mass number.

5 True/False questions

  1. Mass NumberThe number of protons in each atom of a particular element.

          

  2. TemperatureAn ending material in a chemical reaction.

          

  3. Ionic BondAn attraction between two atoms resulting from a sharing of outer-shell electrons or the presence of opposite charges on the atoms. The bonded atoms gain complete outer electron shells.

          

  4. NeutronA subatomic particle having no electrical charge, found in the nucleus of an atom.

          

  5. Aqueous SolutionA liquid that is a homogeneous mixture of two or more substances.

          

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