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Subject Area - 3:
Science and Technology and Engineering Education
  • Standard Area - 3.2: Physical Sciences: Chemistry and Physics
  • Organizing Category - 3.2.A: Chemistry
  • Course - 3.2.C.A: CHEMISTRY
Standard - 3.2.C.A5


Recognize discoveries from Dalton (atomic theory), Thomson (the electron), Rutherford (the nucleus), and Bohr (planetary model of atom), and understand how each discovery leads to modern theory.

Describe Rutherford’s “gold foil” experiment that led to the discovery of the nuclear atom. Identify the major components (protons, neutrons, and electrons) of the nuclear atom and explain how they interact.

  • Assessment Anchor - CHEM.A.1 Properties and Classification of Matter
    • Anchor Descriptor - CHEM.A.1.2 Compare the properties of mixtures.
      • Eligible Content - CHEM.A.1.2.4 Describe various ways that concentration can be expressed and calculated (e.g., molarity, percent by mass, percent by volume).
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