MhChem Chemistry with Dr. Michael Russell

Chemistry 221 L1 Video Lecture from October 27, 2025. This video covers material from Chapter 4 and Chapter 5 including molecular polarity, VSEPR, Valence Bond Theory (VB) and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 24, 2025. This video covers material from Chapter 4 including violations of the octet rule, paramagnetic compounds, formal charges, VSEPR, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 23, 2025, Part 3 of 3. This video covers material from Chapter 4 including VSEPR with trigonal bipyramid and octahedral structures, molecular polarity, how to determine if a molecule is polar or nonpolar and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 23, 2025, Part 2 of 3. This video covers material from Chapter 4 including multiple (double and triple) bonds, exceptions to the octet rule, paramagnetic molecules, VSEPR and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 23, 2025, Part 1 of 3. This video covers material from Chapter 4 including ionic and covalent bonding, Coulomb's Law, the Lewis structure, electronegativity, valence and core electrons, bonding and lone pairs, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 22, 2025. This video covers material from Chapter 4 including polar versus nonpolar bonds, electronegativity, valence electrons, the Lewis structure, building a Lewis structure, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 20, 2025. This video covers day 3 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 17, 2025. This video covers day 2 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 16, 2025, Part 3 of 3. This video covers Part 3 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 16, 2025, Part 2 of 3. This video covers Part 2 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 16, 2025, Part 1 of 3. This video covers Part 1 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 15, 2025. This video covers day 1 of an exam review for the upcoming Midterm Exam I. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 13, 2025. This video covers material from Chapter 3 including the nomenclature of ionic compounds, the nomenclature of covalent compounds, variable charge metals, Roman numbers, Greek prefixes, polyatomic ions, acid and bases, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 10, 2025. This video covers material from Chapter 3 including electron configurations for neutral atoms and ions (cations and anions), periodic trends (for size, ionization energy and electron affinity), and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

A screencast from Chapter 3 in CH 221 entitled “Waves and Frequencies for Electromagnetic Radiation”

A screencast from Chapter 3 in CH 221 entitled “Planck's Constant”

A screencast from Chapter 3 in CH 221 entitled “Photoelectric Effect / nm to kJ Conversions”

A screencast from Chapter 3 in CH 221 entitled “The Bohr Model”

A screencast from Chapter 3 in CH 221 entitled “de Broglie and Heisenberg”

A screencast from Chapter 3 in CH 221 entitled “Schrodinger and the Four Quantum Numbers”

A screencast from Chapter 3 in CH 221 entitled “nl Notation, Orbital Shapes and Nodes”

A screencast from Chapter 3 in CH 221 entitled “The Pauli Exclusion Principle / n+l Rule”

A screencast from Chapter 3 in CH 221 entitled “Atomic Electron Configurations”

A screencast from Chapter 3 in CH 221 entitled “Periodic Trends”

A screencast from Chapter 3 in CH 221 entitled “Naming Ionic Compounds / Polyatomic Ions”

This the Complete Lecture for Chapter 3. This episode is part 1 of 2 episodes.

Chemistry 221 L2 Video Lecture from October 9, 2025, Part 4 of 4. This video covers material from Chapter 3 including ionic compounds with variable charge metals, covalent compounds (Greek prefixes), acids, bases hydrated compounds, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 9, 2025, Part 3 of 4. This video covers material from Chapter 3 including periodic properties using the periodic table, ionic versus covalent bonding, fixed charges on metals and non metals, variable charge metals, creating ionic compounds (and naming them), and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 9, 2025, Part 2 of 4. This video covers material from Chapter 3 including an overview of quantum numbers, the Pauli Exclusion principle, the Aufbau diagram, the n+l rule, placing electrons in atoms, electron configurations of ions, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 9, 2025, Part 1 of 4. This video covers material from Chapter 3 including an overview the de Broglie equation, the Heisenberg uncertainty principle, Schrödinger's equations, the four quantum numbers and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 8, 2025. This video covers material from Chapter 3 including an overview of the four quantum numbers, nl notation, the Pauli exclusion principle, Aufbau diagrams, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 6, 2025. This video covers material from Chapter 3 including converting from nm to kJ (and back again), the Bohr model of the atom, sharp line spectra, the de Broglie equation, the quantum numbers, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

A screencast from Chapter 2 in CH 221 entitled “Chemical Formulas, the 7 Diatomics, Allotropes”

A screencast from Chapter 2 in CH 221 entitled “Empirical Formulas and Isomers”

Chemistry 221 L1 Video Lecture from October 3, 2025. This video covers material from Chapter 2 and Chapter 3 including the molar mass of compounds, light and electromagnetic radiation, frequency, wavelength, the speed of light, Planck's constant, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 2, 2025, Part 4 of 4. This video covers material from Chapter 3 including the Bohr model for the atom, sharp line spectra, absorbance and emission, calculating the wavelength and frequency from a change in energy, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 2, 2025, Part 3 of 4. This video covers material from Chapter 3 including a discussion of light, electromagnetic radiation, frequency and wavelength, the speed of light and Planck's constant and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 2, 2025, Part 2 of 4. This video covers material from Chapter 2 including a discussion of the mole and Avogadro's number, the importance of the atomic mass number with relationship to molar mass, calculating the molar mass of a compound, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from October 2, 2025, Part 1 of 4. This video covers material from Chapter 2 including an overview of the atom, protons, neutrons, electrons, the atomic number, the mass number, isotopes, atomic mass, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from October 1, 2025. This video covers material from Chapter 2 including the importance of atomic mass, how atomic mass is calculated, the 7 diatomics, molecular formulas and empirical formulas, the mole, Avogadro's number, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from September 29, 2025. This video covers material from Chapter 2 including the composition of the atom (protons, neutrons and electrons), the atomic number, the Rutherford Gold Foil experiment, atomic mass, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from September 26, 2025. This video covers material from Chapter 1 (and a small bit from Chapter 2) including measurements in chemistry, precision and accuracy significant figures, rounding of numbers, mass percentages, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from September 25, 2025, Part 3 of 3. This video covers material from Chapter 1 including measurements in chemistry, precision and accuracy significant figures, rounding of numbers, mass percentages, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from September 25, 2025, Part 2 of 3. This video covers material from Chapter 1 including more on elements and the periodic table, SI units, temperature scales, density, dimensional analysis, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L2 Video Lecture from September 25, 2025, Part 1 of 3. This video covers material from Chapter 1 including a discussion of "what is chemistry", types of chemistry, the importance of chemistry, atoms, molecules and mixtures, the periodic table, important groups on the periodic table, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from September 24, 2025. This video covers material from Chapter 1 including a discussion of measurements and SI units, length, mass, volume, density, temperature scales, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Chemistry 221 L1 Video Lecture from September 22, 2025. This video covers material from Chapter 1 including a discussion of "what is chemistry", types of chemistry, the importance of chemistry, atoms, molecules and mixtures, and more. CH 221 website: http://mhchem.org/221 Let me know if you have any questions! Peace!

Welcome! This is a video to help students get started in Dr. Russell's chemistry classes at Mt. Hood Community College in Gresham, Oregon, USA. Website: http://mhchem.org Let me know if you have any questions! Peace!

This video will help you find our three main chemistry classrooms (namely AC 1303, AC 2501 and AC 2507) as well as my office (AC 2568) at Mt. Hood Community College in Gresham, Oregon, USA. To get to all of these locations, go to the "F" or "G" parking lots (or as close to them as possible), both of which are located near the main MHCC entrance on NE 29th street and NE Kane Dr. in Gresham ). AC 1303 is on the lower level of the campus, adjacent to the Planetarium. AC 2501, AC 2507 and my office (AC 2568) are located on the upper level of campus, and all are very close to the "F" and "G" parking lots. Let me know if you have any questions! Peace!

Welcome to Chemistry 221 with Dr. Michael Russell!

A screencast from Chapter 1 in CH 221 entitled "Significant Figures (Sig figs)"