Unit Plan 6: Arrangement of Electrons in Atoms
Chemistry Level 2/Mrs. Wissler
Learning Objectives: The student will be able to
- Explain the mathematical relationship among the speed, wavelength, and frequency of electromagnetic radiation.
- Discuss the dual wave-particle nature of light.
- Describe the Bohr model of the hydrogen atom.
- Compare and contrast the Bohr model and the quantum model of the atom.
- Explain how the Heisenberg uncertainty principle and the Schrodinger wave equation led to the idea of atomic orbitals.
- List the four quantum numbers and describe their significance.
- Relate the number of sublevels corresponding to each of an atom’s main energy levels, the number of orbitals per sublevel, and the number of orbitals per main energy level.
- List the total number of electrons needed to fully occupy each main energy level.
- State and apply Aufbau principle, the Pauli Exclusion Principle, and Hund’s rule.
- Describe the electron configurations for the atoms of any element using orbital notation and electron-configuration notation.
Essential Questions: How can atomic models be used to explain atoms and help us understand the interaction of elements and compounds?
Central Concepts: Atomic models are used to explain atoms and help us understand the interaction of elements and compounds observed on a macroscopic scale. The periodic table displays the repeating patterns, which are related to the atoms’ outermost electrons.
Text: Ch. 4 - all section objectives and bolded vocabulary
Day 1 A,B – 12/21 D-12/22
Notes: Wave and Particle Properties of Light, Electromagnetic Spectrum
Flame Test Set Up and Lighting Practice
HW: Guided Reading Sec 4.1 The Development of a New Atomic Model #1-13
Day 2 A,B – 12/23 D-1/4
Lab: Flame Test
HW: Guided Reading questions #14-22 (D block)
Day 3 A,B – 1/5 D- 1/6
Demonstration: Spectroscopes Natural and Artificial Light
Notes: Line-Emission Spectra and the Bohr Model
Lab: Complete Unknowns for Flame Test
HW: Flame Test Lab Report
Day 4 A,B – 1/7 D-1/8
Warm Up: Bohr Model Quiz Review
Group Study Questions
Powerpoint: Wave and Particle Properties of Electrons, Heisenberg and Schrodinger
HW: Study for Bohr Model Quiz
Day 5 A,B – 1/11 D-1/12
Bohr Model Quiz
Finish Wave and Particle Properties of Electrons
Graphic Organizer/Models: Quantum Model of the Atom and Orbital Shapes
Midterm Review Materials
HW: Sec 4.2 Guided Reading, Review for Midterm
Day 6 A,B – 1/13 D-1/14
Graphic Organizer: spdf block Periodic Table
Notes: electron configuration and atomic sublevels/energy graph
Practice: Electron Configuration Notation and Orbital Notation
Notes: Aufbau Principle, Pauli Exclusion Principle and Hund’s Rule
HW: Electron Configuration Practice, Review for Midterm
Day 7 A,B – 1/15 D-1/19
Unit 1-5 Review
HW: study for Midterm, prepare notecard
MCAS Chemistry Frameworks:
ü MCAS 2.3 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.
ü MCAS 2.4 Write the electron configurations for the first twenty elements of the periodic table.
ü MCAS 3.3 Relate the position of an element on the periodic table to its electron configuration and compare its reactivity to the reactivity of other elements in the table.
ü MCAS 3.4 Identify trends on the periodic table (ionization energy, electronegativity, and relative sizes of ions).