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5 Written questions

5 Matching questions

  1. pH Scale
  2. Heat
  3. Product
  4. Fourth shell of an atom can contain how many electrons?
  5. Second shell of an atom can contain how many electrons?
  1. a An ending material in a chemical reaction.
  2. b A scale we used to describe how acidic or basic a solution is. The scale ranges from 0-14, 0 being the most acidic and 14 being the most basic. 7 is neutral (pure water)
  3. c The amount of energy associated with the movement of atoms and molecules in a body of matter.
  4. d 8
  5. e 18

5 Multiple choice questions

  1. A solution in which water is the solvent.
  2. One of several atomic forms of an element, each with teh same number of protons but different number of neutrons.
  3. Two or more atoms held together by covalent bonds.
  4. A starting material in a chemical reaction.
  5. 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 True/False questions

  1. ElementA subsctance that cannot be broken down to other substance by ordinary chemcial means.

          

  2. BaseThe smallest unit of matter that retains the properties of an element.

          

  3. Electron ShellsAn energy level representing the distance of an electron from the nucleus of an atom.

          

  4. Third shell of an atom can contain how many electrons?2

          

  5. ElectronA subatomic particle having no electrical charge, found in the nucleus of an atom.

          

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