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5 Written questions

5 Matching questions

  1. Trace elements
  2. Reactants
  3. Electronegativity
  4. Nonpolar Covalent Bonds
  5. Product
  1. a A covalent bond in which electrons are shared equally between two atoms of similar electronegativity.
  2. b The attraction of a given atom for the electrons of a covalent bond.
  3. c A starting material in a chemical reaction.
  4. d An ending material in a chemical reaction.
  5. e an element that is essential for life but required in extremely minute amounts.

5 Multiple choice questions

  1. A subatomic particle with a single positive electrical charge, found in the nucleus of an atom.
  2. A molecule containing polar covalent bonds and having an unequal distribution of charges.
  3. A subsctance that cannot be broken down to other substance by ordinary chemcial means.
  4. The making and breaking of chemical bonds, leading to changes in the composition of matter.
  5. 18

5 True/False questions

  1. BaseA compound resulting from the formation of ionic bonds; also called an ionic compound.

          

  2. MoleculeA substance that is dissolved in a solution.

          

  3. AdhesionThe attraction between different kinds of molecules.

          

  4. MatterThe smallest unit of matter that retains the properties of an element.

          

  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).