PBS
How Are Quasiparticles Different From Particles?
The device you’re watching this video on is best understood by thinking about positive and negative charges moving around a circuit of diodes and transistors. But the only elementary particle actually flowing in the circuit is the...
Crash Course
Nucleophiles and Electrophiles - Crash Course Organic Chemistry
Organic reactions are kind of like carefully choreographed fight scenes, and nucleophilic attack is a key move. This episode of Crash Course Organic Chemistry is all about nucleophiles and electrophiles, or what happens at those...
Bozeman Science
Lewis Diagrams and VSEPR Models
In this video Paul Andersen explains how you can use Lewis Diagrams and VSEPR Models to make predictions about molecules. The Lewis diagrams are a two-dimensional representations of covalent bonds and the VSEPR models show how the...
Crash Course
Polarity Resonance and Electron Pushing - Crash Course Organic Chemistry
We’ve all heard the phrase “opposites attract.” It may or may not be true for people, but it’s definitely true in organic chemistry. In this episode of Crash Course Organic Chemistry, we’re learning about electronegativity, polarity,...
Bozeman Science
Drawing Lewis Dot Diagrams
Mr. Andersen shows you how to draw Lewis Dot Diagrams for atoms and simple molecules.
Bozeman Science
Atoms and the Periodic Table
Mr. Andersen describes atomic structure and tours the periodic table.
Bozeman Science
Metallic Bonding
In this video Paul Andersen explains how metallic bonding structure creates the different properties of metals. The electron sea model explains how the positive nuclei are locked into a negative sea of delocalized electrons. This sharing...
Curated Video
Why Atoms Form Molecules: The Quantum Basis of Chemical Bonds
New ReviewVideo on QM of Atoms which may clarify some concepts: • The Quantum Mechanical model of an atom. W... Why do atoms combine to form molecules? The quantum mechanics of chemical bonds and chemistry. How is it that we can have so many...
Curated Video
Why Does Changing Just One Proton Change an Element?
New ReviewWhy does changing just one proton in the nucleus of an atom make a different element? How can a single proton make such a huge difference in an element’s properties? The simple answer is: The number of protons determines the number of...
Curated Video
Unlocking Carbon's Secrets Electronic Configurations and Valency in the Carbon Family
Group 14 elements are carbon (C), silicon (Si), germanium (Ge), tin (Sn), and lead (Pb). Their valence electron configuration is unique and is shown by the symbol ns²np². This set-up shows that there are two electrons in the outermost s...
Curated Video
Solid State Electrical Properties and Band Theory
Electrical conductivity varies from metals to insulators. Solids can be divided into three categories: conductors, insulators, and semiconductors. Conductors are solids through which electricity can flow to a large extent, classified as...
Curated Video
Formal Charge Made Simple: A Guide to Molecular Stability
Formal Charge Made Simple: A Guide to Molecular Stability Formal charge is a bookkeeping tool used to estimate the charge distribution within a molecule. It is calculated by comparing the number of valence electrons in an atom's free...
Curated Video
Lewis Structures in Action: CO₂ and NO₂ Examples
In this topic, we explore how to draw and interpret the Lewis structures of carbon dioxide (CO₂) and nitrogen dioxide (NO₂), two important molecules in chemistry. CO₂ features a linear structure with double bonds between carbon and...
Curated Video
Mastering Lewis Structures: Essential Rules for Drawing Bond Maps
Lewis structures are diagrams that represent the bonding between atoms in a molecule and the lone pairs of electrons that may exist. These structures are crucial in understanding how atoms share or transfer electrons to form stable...
Curated Video
Multiple Covalent Bonds: The Power of Double and Triple Bonds
Double and triple bonds involve the sharing of two or three pairs of electrons, providing additional stability and influencing molecular properties like rigidity and reactivity
Curated Video
Fajan’s Rules: Predicting Ionic vs. Covalent Bonds
Fajan's rules explain how factors like ion size, charge, and polarizability determine whether a bond will be predominantly ionic or covalent
Curated Video
Kossel-Lewis Theory: The Foundations of Chemical Bonding
The Kossel-Lewis approach introduced the concept of ionic and covalent bonds. It emphasizes the role of electron transfer or sharing between atoms to achieve noble gas configurations
Curated Video
Lewis Symbols Decoded: Simplifying Electron Counts
Lewis symbols represent valence electrons around an atom's chemical symbol, helping visualize bonding and the formation of molecules
Science ABC
What Are Valence Electrons And How To Find Them?
Valence electrons are the electrons that are located in the outermost shell of an atom. In other words, these are the electrons that can be gained or lost during a chemical reaction. In order to determine the number of valence electrons...
Curated Video
Why does chemistry happen?! Element Stability and the Octet Rule!
Why does chemistry happen?? Why do ions form?? Why do elements bond together?? These are all important questions and the answer comes back to one very important principle in chemistry and that is element stability. Elements are stable...
Curated Video
Valence Electrons & Lewis Dot Diagrams - what are they and how do I draw them?
Valence electrons are the electrons in the outermost energy level of an atom. They are important because they are involved in the chemical bonding of our elements which helps determine the reactivity of elements. In order to be stable,...
Curated Video
What Are Valence Electrons And How To Find Them?
Valence electrons are the electrons that are located in the outermost shell of an atom. In other words, these are the electrons that can be gained or lost during a chemical reaction. In order to determine the number of valence electrons...
Curated Video
Charges in Atoms, Atomic Models, and Quantum Numbers
This video explains how the different particles in an atom have charges, how the different particles affect the overall charges of an atom, and how atomic models are created.
Visual Learning Systems
Forming Bonds: How Atoms Bond
Upon viewing the Forming Bonds video series, students will be able to do the following: Understand that matter is made up of tiny particles called atoms. Explain that atoms consist of many different types of subatomic particles including...