Download Subject Area Standard Area Organizing Category Course Standard

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:
MODELS
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.2: Atomic Structure and the Periodic Table
Anchor Descriptor
CHEM.A.2.1: Explain how atomic theory serves as the basis for the study of matter.
Eligible Content
CHEM.A.2.1.2: Differentiate between the mass number of an isotope and the average atomic mass of an element.