NAME: ________________________

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5 Written Questions

5 Matching Questions

  1. The tendency of water molecules to stick to each other is called
  2. What is mass?
  3. What is a covalent bond?
  4. The number of covalent bonds an atom can form is equal to what?
  5. What are elements?
  1. a Forms when 2 atoms share 1 or more pairs of outer shell electrons and forms a molecule.
  2. b The number of additional electrons needed to fill its outer shell.
  3. c Substances that cannot be broken down into other substances.
  4. d cohesion
  5. e The sum of the number of protons and neutrons in its nucleus.

5 Multiple Choice Questions

  1. A subatomic particle w/ a single unit of positive electrical charge (+)
  2. Protons and neutrons.
  3. Atoms held together by covalent bonds.
  4. A subatomic particle w/ a negative charge.
  5. Oxygen, carbon, hydrogen, and nitrogen.

5 True/False Questions

  1. What determines the chemical properties of an atom?the atomic number.


  2. What are the three types of chemical bonds?Formed when a particularly positive atom from one polar molecule is attracted to the partially negative atoms in another molecule.


  3. How many of the 90 naturally- occuring elements are used by living organisms?Oxygen, carbon, hydrogen, and nitrogen.


  4. The bond between the hydrogen atom of one water molecule and the oxygen atom of another water molecule is made possible bythe polarity of the water molecule


  5. Which part of the atom has the most energy?The outer shell.


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