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5 Written questions

5 Matching questions

  1. Solute
  2. What 4 elements make up about 96% of living matter?
  3. Compound
  4. Atom
  5. Electron
  1. a A subatomic particle with a single negative electrical charge. One or more electrons move around the nuclues of an atom.
  2. b a substance consisting of two or more different elements combined in a fixed ratio.
  3. c Oxygen, carbon, hydrogen, and nitrogen.
  4. d A substance that is dissolved in a solution.
  5. e The smallest unit of matter that retains the properties of an element.

5 Multiple choice questions

  1. A chemical bond resulting from the attraction between oppositely charged ions.
  2. Rain, snow or fog that is more acidic than pH 5.2.
  3. The making and breaking of chemical bonds, leading to changes in the composition of matter.
  4. An atom's central core, containing protons and neutrons.
  5. A compound resulting from the formation of ionic bonds; also called an ionic compound.

5 True/False questions

  1. Polar MoleculeA molecule containing polar covalent bonds and having an unequal distribution of charges.


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


  3. AdhesionThe attraction between different kinds of molecules.


  4. AcidA substance that increases the hydrogen ion concentration in a solution. 0 on pH scale is a strong acid.


  5. Hydrogen BondsA 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).