Chemistry Unit 4

Big Idea:

Arrangement of electrons in the atom and the EM spectrum

Student Expectations:

Priority TEKS

C.6(B) describe the mathematical relationships between energy, frequency, and wavelength of light using the electromagnetic spectrum

Focus TEKS

C.6(D) express the arrangement of electrons in atoms through electron configurations and Lewis valence electron dot structures

Ongoing TEKS

C.5(B) [Readiness] identify and explain the properties of chemical families, including alkali metals, alkaline earth metals, halogens, noble gases, and transition metals, using the Periodic Table.

C.2(B) know that scientific hypotheses are tentative and testable statements that must be capable of being supported or not supported by observational evidence. Hypotheses of durable explanatory power that have been tested over a wide variety of conditions are incorporated into theories

C.3(F) describe the history of chemistry and contributions of scientists

Student Learning Targets:

• I will apply the Pauli Exclusion Principle, the Aufbau’s principle, and Hund’s rule to write electron configurations using orbital diagrams and electron configuration notation.
• I will identify areas of the periodic table based on electron configuration.
• I will relate the wave model of light to the electromagnetic spectrum.
• I will identify the relationship between wavelength, frequency, and energy.
• I will differentiate types of electromagnetic radiation based on energy, frequency, and wavelength.
• I will describe the quantum nature of the atom.
• I will relate atomic emission spectra to quantum theory.
• I will contrast the Bohr model and the quantum mechanical model (orbits vs. orbitals).

Essential Questions:

• In what ways can mathematical relationships between properties of light be demonstrated?
• How did the EM Spectrum lead to the arrangement of electrons in the atom?

Extra Information:

Adopted Textbook: Chemistry, Pearson

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