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Type: Multiple-Choice
Category: Atomic Structure
Level: Grade 10
Author: Jarrika
Last Modified: 7 years ago

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Atomic Structure Question

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Grade 10 Atomic Structure

Which of the following statements is not true regarding a carbon-12 atom?
  1. It has 6 protons and 6 neutrons.
  2. Scientists assigned a mass of 6 atomic mass units to the carbon-12 atom.
  3. It is used as a standard for comparing the masses of atoms.
  4. An atomic mass unit is defined as one-twelfth the mass of a carbon-12 atom.