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5 Written questions

5 Matching questions

  1. Hydrogen Bonds
  2. Ocean Acidification
  3. Nonpolar Covalent Bonds
  4. Compound
  5. Second shell of an atom can contain how many electrons?
  1. a Decreasing pH of ocean waters due to absoprtion of excess atmospheric CO2 from the burning of fossil fuels.
  2. b 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. c 8
  4. d A covalent bond in which electrons are shared equally between two atoms of similar electronegativity.
  5. e a substance consisting of two or more different elements combined in a fixed ratio.

5 Multiple choice questions

  1. A solution in which water is the solvent.
  2. A subatomic particle having no electrical charge, found in the nucleus of an atom.
  3. The sum of the number of protons and neutrons in an atom's nucleus.
  4. The smallest unit of matter that retains the properties of an element.
  5. A substance that increases the hydrogen ion concentration in a solution. 0 on pH scale is a strong acid.

5 True/False questions

  1. ElectronegativityThe attraction of a given atom for the electrons of a covalent bond.


  2. Radioactive Isotopeoccurs because the molecules with the greates energy leave.


  3. Chemical BondsA chemical bond resulting from the attraction between oppositely charged ions.


  4. CohesionThe sticking together of molecules of the same kind, often by hydrogen bonds.


  5. MatterA compound resulting from the formation of ionic bonds; also called an ionic compound.


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