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Essential Chemistry for Biology - Chapter 2 Test

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5 Written Questions

5 Matching Questions

  1. What are isotopes?
  2. What makes up the nucleus?
  3. How many electrons can the inner shell of an atom hold?
  4. What is mass?
  5. Which part of the atom has the most energy?
  1. a 2.
  2. b The outer shell.
  3. c Elements that exist in different forms
    Forms of an element that differ in mass
    Same num of protons and electrons but diff num of neutrons
  4. d The sum of the number of protons and neutrons in its nucleus.
  5. e Protons and neutrons.

5 Multiple Choice Questions

  1. Substances that cannot be broken down into other substances.
  2. Forms when 2 atoms share 1 or more pairs of outer shell electrons and forms a molecule.
  3. A subatomic particle w/ a negative charge.
  4. The number of electrons in the outermost shell.
  5. Electrons.

5 True/False Questions

  1. What is ion?The sum of the number of protons and neutrons in its nucleus.

          

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

          

  3. What is matter?The sum of the number of protons and neutrons in its nucleus.

          

  4. What is a proton?A subatomic particle w/ a single unit of positive electrical charge (+)

          

  5. The number of shells an atom has depends on what?the number of electrons it has.

          

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