An atom is the smallest unit of a pure substance (element) and is composed of subatomic particles, specifically protons, electrons, and neutrons.

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• Person: Not available Organization: Lumen Learning
  Structural Organization of the Human Body | Anatomy and ...

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• Structural Organization of the Human Body | Anatomy and ... courses.lumenlearning.com Lumen Learning via serper

Referenced by nodes (2)

• electrons concept
• subatomic particle concept