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Subject Area - 3:
Science and Technology and Engineering Education
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.
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Assessment Anchor - CHEM.A.2 Atomic Structure and the Periodic Table
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Anchor Descriptor - CHEM.A.2.1 Explain how atomic theory serves as the basis for the study of matter.
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Eligible Content - CHEM.A.2.1.1 Describe the evolution of atomic theory leading to the current model of the atom based on the works of Dalton, Thomson, Rutherford, and Bohr.
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Eligible Content - CHEM.A.2.1.2 Differentiate between the mass number of an isotope and the average atomic mass of an element.
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Anchor Descriptor - CHEM.A.2.2 Describe the behavior of electrons in atoms.
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Eligible Content - CHEM.A.2.2.1 Predict the ground state electronic configuration and/or orbital diagram for a given atom or ion.
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Eligible Content - CHEM.A.2.2.2 Predict characteristics of an atom or an ion based on its location on the periodic table (e.g., number of valence electrons, potential types of bonds, reactivity).
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Eligible Content - CHEM.A.2.2.3 Explain the relationship between the electron configuration and the atomic structure of a given atom or ion (e.g., energy levels and/or orbitals with electrons, distribution of electrons in orbitals, shapes of orbitals).
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Eligible Content - CHEM.A.2.2.4 Relate the existence of quantized energy levels to atomic emission spectra.
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Anchor Descriptor - CHEM.A.2.3 Explain how periodic trends in the properties of atoms allow for the prediction of physical and chemical properties.
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Eligible Content - CHEM.A.2.3.1 Explain how the periodicity of chemical properties led to the arrangement of elements on the periodic table.
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Eligible Content - CHEM.A.2.3.2 Compare and/or predict the properties (e.g., electron affinity, ionization energy, chemical reactivity, electronegativity, atomic radius) of selected elements by using their locations on the periodic table and known trends.
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