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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
  • Grade Level - 3.2.12.A: GRADE 12
Standard - 3.2.12.A2

Distinguish among the isotopic forms of elements.

Explain the probabilistic nature of radioactive decay based on subatomic rearrangement in the atomic nucleus.

Explain how light is absorbed or emitted by electron orbital transitions.

  • 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.
    • Anchor Descriptor - CHEM.A.2.2 Describe the behavior of electrons in atoms.
    • Anchor Descriptor - CHEM.A.2.3 Explain how periodic trends in the properties of atoms allow for the prediction of physical and chemical properties.
      • Eligible Content - CHEM.A.2.3.1 Explain how the periodicity of chemical properties led to the arrangement of elements on the periodic table.
      • 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.
  • Assessment Anchor - CHEM.B.1 The Mole and Chemical Bonding
    • Anchor Descriptor - CHEM.B.1.1 Explain how the mole is a fundamental unit of chemistry.
    • Anchor Descriptor - CHEM.B.1.2 Apply the mole concept to the composition of matter.
      • Eligible Content - CHEM.B.1.2.1 Determine the empirical and molecular formulas of compounds.
      • Eligible Content - CHEM.B.1.2.2 Apply the law of definite proportions to the classification of elements and compounds as pure substances.
      • Eligible Content - CHEM.B.1.2.3 Relate the percent composition and mass of each element present in a compound.
    • Anchor Descriptor - CHEM.B.1.4 Explain how models can be used to represent bonding.
      • Eligible Content - CHEM.B.1.4.1 Recognize and describe different types of models that can be used to illustrate the bonds that hold atoms together in a compound (e.g., computer models, ball‐and‐stick models, graphical models, solid‐sphere models, structural formulas, skeletal formulas, Lewis dot structures).
      • Eligible Content - CHEM.B.1.4.2 Utilize Lewis dot structures to predict the structure and bonding in simple compounds.
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