Chemistry I – Honors
Unit 2: Quantum Theory and Periodicity
Entry Tickets
2.1 – Introduction to Quantum Theory
 Watch the corresponding video on the class website: Intro. to Quantum Theory.
 On a separate sheet of paper, answer the following prompts:
1. Define “quantum” and provide 2 examples.
2. Write the two different equations used in the video to solve the example problems.
3. Define all variables and constants.
4. What are the units on each of the variables used in the light equations?
2.2 – Electron Configuration
 Watch the corresponding video on the class website: Electron Configurations.
 On a separate sheet of paper, respond to the following prompts:
1. What is meant by needing to “read” the periodic table? Describe this phenomenon in a minimum of
two sentences.
2. Draw an orbital diagram for silicon (Si, Z = 14)
3. Write an electron configuration for calcium.
2.3 – Emission and Absorption Spectra
 Watch the corresponding video on the class website: Emission vs. Absorption Spectra.
 Read the Procedure for the Average Atomic Mass Lab: “Flame Test”
 On a separate sheet of paper, respond to the following prompts:
1. Define emission and absorption.
2. Draw a simple diagram indicating the processes of both excitation and relaxation of an electron from
its ground state to an excited state and back down.
3. Calculate the energy of a photon with the wavelength of 4.34 nm.
2.4 – Quantum Numbers
 Watch the corresponding video on the class website: Quantum Numbers
 On a separate sheet of paper, respond to the following prompts:
1. Define the four quantum numbers. Once defined, indicate what information each quantum number
provides about the electron.
2. Derive the set of quantum numbers (remember there are four) for the last electron in a neutral calcium
atom.
2.5 – Periodic Properties
 Watch the corresponding video on the class website: Periodic Properties.
Suggestion: Use the graphic organizer handed out in class while watching the video. Be sure to include
as much information as possible; the more, the better. If you did not receive a copy, or have misplaced
your original, an electronic copy may be found in a link to the left of the video.
 Read the procedure for Periodic Law and Periodic Table Lab
 Complete the Pre-Lab Assignment from the Periodic Law and Periodic Table Lab