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Type: Multiple-Choice
Category: Periodic Table and Elements
Level: Grade 6
Author: busser1
Last Modified: 6 years ago

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Periodic Table and Elements Question

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Grade 6 Periodic Table and Elements

If the atomic number of mercury is 80 and its atomic mass is 200.90 amu, then mercury has which of the following numbers of protons, electrons, and neutrons?
  1. 80 protons, 40 electrons, 200 neutrons.
  2. 280 protons, 280 electrons, 120 neutrons.
  3. 80 protons, 80 electrons, 200 neutrons.
  4. 80 protons, 80 electrons, 121 neutrons.
  5. None of the above.