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5 Written questions

5 Matching questions

  1. What is an electron?
  2. How many electrons can the inner shell of an atom hold?
  3. How many of the 90 naturally- occuring elements are used by living organisms?
  4. Which part of the atom has the most energy?
  5. What determines which element it is?
  1. a 25.
  2. b the atomic number.
  3. c The outer shell.
  4. d 2.
  5. e A subatomic particle w/ a negative charge.

5 Multiple choice questions

  1. cohesion
  2. Forms when 2 atoms share 1 or more pairs of outer shell electrons and forms a molecule.
  3. The number of additional electrons needed to fill its outer shell.
  4. Formed when a particularly positive atom from one polar molecule is attracted to the partially negative atoms in another molecule.
  5. The number of electrons in the outermost shell.

5 True/False questions

  1. What makes up the nucleus?Substances that cannot be broken down into other substances.


  2. What primarily determines how an atom behaves?Electrons.


  3. What is an ionic bond?A compound held together by ionic bonds.


  4. What is a molecule?a molecule that has opposite charges on opposite ends.


  5. What are the 4 most abundant elements in living cells?Oxygen, carbon, hydrogen, and nitrogen.