To see all my Chemistry videos, check out
This video is about the different ways that scientists have pictured the atoms over the years. It starts with Democritus and Leucippus, the first philosophers to discuss atoms. Then John Dalton did experiments on atomic theory. J.J. Thompson proposed the plum pudding model of the atom when he discovered electrons, and Ernest Rutherford countered with the nuclear atom when he discovered the nucleus in the gold foil experiment. Niels Bohr imagined that electrons circled the nucleus in orbits, and Erwin Schrodinger's quantum mechanical model pictures electrons buzzing around in orbitals.
I made this during the leaving for fun. I got an A+ in chemistry. Do remember that this was made for myself to learn, it could contain a few spelling mistakes or other issues. If you do like the way it's written and helps you understand, I could post a few more of my notes in here.
Watch more videos on http://www.brightstorm.com/science/chemistry
SUBSCRIBE FOR All OUR VIDEOS!
VISIT BRIGHTSTORM.com FOR TONS OF VIDEO TUTORIALS AND OTHER FEATURES!
Facebook ► https://www.facebook.com/brightstorm
Pinterest ► https://www.pinterest.com/brightstorm/
Google+ ► https://plus.google.com/+brightstorm/
Twitter ► https://twitter.com/brightstorm_
Brightstorm website ► https://www.brightstorm.com/
We'll learn about oxidizing agents and reducing agents, what they are, what they do, and how to identify them in chemical equations. Oxidizing agents make oxidation happen, and reducing agents make oxidation happen. And oxidizing agent takes electrons from something, allowing it to be oxidized, and a reducing agents gives electrons to something, allowing it to be reduced. You can remember this by noting that the thing that is reduced is the oxidizing agent, and the thing that is oxidized is the reducing agent. We'll then look at some equations and identify the oxidizing and reducing agents. To do this, we have to write oxidation numbers (or oxidation states) for the elements in the equation, and then figure out how electrons are moving, what is being oxidized and what is being reduced.
A mole is like a dozen. It is a name for a specific number of things. There are 12 things in a dozen, and 602 hexillion things in a mole. We'll talk about what moles are and why they are important. We will see how to abbreviate the mole number (Avogadro's number) using scientific notation, and we'll see how giant this number is.
Shmoop Chemistry in-depth review of topics related to Organic Chemistry. Detailed lessons on Organic Chemistry topics and key concepts. Created (lovingly) by Ph.D. students from Stanford, Harvard, Berkeley
All single covalent bonds are sigma bonds -- these bonds are between the nuclei on the so called internuclear axis. If 2 parallel p orbitals on different atoms overlap, a pi bond will be formed. The top lobes of the p orbitals overlap, as do the bottom ones.
A sigma and a pi bond is a double bond. A sigma and 2 pi bonds is a triple bond.
Hank gives us a tour of the most important table ever, including the life story of the obsessive man who championed it, Dmitri Mendeleev. The periodic table of elements is a concise, information-dense catalog of all of the different sorts of atoms in the universe, and it has a wealth of information to tell us if we can learn to read it.
Like Crash Course? http://www.facebook.com/YouTubeCrashCourse
Follow Crash Course! http://www.twitter.com/TheCrashCourse
Tumbl Crash Course: http://thecrashcourse.tumblr.com
Table of Contents
Dmitri Mendeleev - 0:45
Mendeleev's Organization of the Periodic Table - 2:31
Relationships in the Periodic Table - 5:03
Why Mendeleev Stood Out from his Colleagues - 7:09
How the Periodic Table Could be Improved - 8:28
More info. about the cylindrical periodic table of elements: http://www.av8n.com/physics/periodic-table.htm Support CrashCourse on Subbable: http://subbable.com/crashcourse