Quantum Chemistry Review KEY PDF

# BC High Chemistry - Quantum Chemistry Test Review KEY ## A. Spectral Line Series for Hydrogen 1. The **Lyman** series goes from a higher energy level to the 1st energy level (n1) and emitted **UV** radiation. 2. The **Balmer** series goes from a higher energy level to the 2nd energy level (n2) a...

# BC High Chemistry - Quantum Chemistry Test Review KEY ## A. Spectral Line Series for Hydrogen 1. The **Lyman** series goes from a higher energy level to the 1st energy level (n1) and emitted **UV** radiation. 2. The **Balmer** series goes from a higher energy level to the 2nd energy level (n2) and emitted **Visible** radiation. 3. The **Paschen** series goes from a higher energy level to the 3rd energy level (n3) and emitted **IR** radiation. ## B. Electromagnetic Radiation 1. Of the following parts of the electromagnetic spectrum, which has the: (UV-light, X-Rays, radio waves, Microwaves, visible light, gamma rays, & infrared) * **Longest wavelength?** Radio waves * **Shortest wavelength?** Gamma Rays 2. In the visible light spectrum, which has the: (red, orange, yellow, green, blue, indigo, violet) * **Longest wavelength?** Red * **Shortest wavelength?** Violet ## C. Spectroscopy 1. A _**Continuous Spectrum**_ is produced when all the colors of a rainbow (from red to violet) are present. 2. An _**Emission Spectrum**_ will appear in a spectrum if the source emits specific wavelengths of radiation. 3. _**Absorption Spectrum**_ are usually seen as dark lines, or lines of reduced intensity, on a continuous spectrum. ## D. Electron Configuration Rules 1. **Aufbau Principle** states an electron will occupy the lowest energy level first. 2. **Pauli Exclusion** states no specific orbital can hold more than 2 e^- and they must have opposite spins. 3. **Hund's Rule** states an orbital's equal energy are occupied by 1 e^- before they double up. ## E. Electron Configuration | Element | Orbital Notation | Electron Configuration Notation | Noble Gas Notation | |---|---|---|---| | 12e<br>Mg | 1s² 2s² 2p⁶ 3s² | 1s² 2s² 2p⁶ 3s² | [Ne] 3s² | | 34e<br>Se | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁴ | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁴ | [Ar] 4s² 3d¹⁰ 4p⁴ | | 42e<br>Mo | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁵ | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁵ | [Kr] 5s¹ 4d⁵ | | 50e<br>Sn | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p² | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p² | [Kr] 5s² 4d¹⁰ 5p² | | 55e<br>Cs | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹ | 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹ | [Xe] 6s¹ | | 18e<br>Cl^- | 1s² 2s² 2p⁶ 3s² 3p⁶ | 1s² 2s² 2p⁶ 3s² 3p⁶ | [Ne] 3s² 3p⁶ | | 10e<br>Na⁺ | 1s² 2s² 2p⁶ | 1s² 2s² 2p⁶ | [He] 2s² 2p6 | ## F. Electron Configuration (Multiple Choice) - Circle the letter to the correct answer 1. Which is the electron configuration for: **Al** * **A = [Ne]3s²3p¹** * B = 1s²2s²2p⁶3s²3p⁶ * C = [Ar]1s²2s²2p¹ * D = 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹ 2. Which is the electron configuration for: **Ge** * A = [Kr] 4s²3d¹⁰4p⁶5s²4d¹⁰5p² * B= 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p² * C = [Ar]4s²3d¹⁰4p¹ * **D = 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴** 3. Which is the electron configuration for: **Rb** * A = [Ar]4s¹ * B = 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s¹ * C = 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s² * **D = [Kr]5s¹** 4. Which is the electron configuration for: **Mn** * A = [Ne] 3s²3p⁶ * **B = 1s²2s²2p⁶3s²3p⁶4s²3d⁵** * C = 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d⁵ * D = 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰ 5. Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s² * **A. Sr** * B. TI * C. Ba * D. Be 6. Which element has the electron configuration [Ar]4s²3d² * A. Sr * **B. Ti** * C. Ba * D. Be 7. Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p² * A. Sn * B. Sr * **C. Sb** * D. Se 8. Which element has the electron configuration [Ar]4s²3d⁷ * A. Rh * B. Ni * C. Cr * **D. Co** 9. Which element has the electron configuration [Kr]5s²4d¹⁰5p² * **A. Sn** * B. Sr * C. Sb * D. Se 10. Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s² * A. Sr * B. TI * **C. Ba** * D. Be ## G. Quantum Numbers 1. What is the quantum number for the last electron in 1s²2s²2p⁴ * A. (2, 0, 0, +1/2) * **B. (2, 1, -1, -1/2)** * C. (2, 1, 0, -1/2) * D. (2, 1, -1, +1/2) 2. What is the quantum number for the last electron in 1s²2s²2p⁶3s² * A. (3, 0, 0, +1/2) * B. (3, 1, -1, -1/2) * **C. (3, 0, 0, -1/2)** * D. (3, 1, -1, +1/2)