Explore the chemistry of fuels, which are materials that react with an oxidant to produce energy. Start with cellulose, the primary constituent of wood, then survey petroleum distillates, such as kerosene, diesel, and gasoline. Close by learning how plant oils can be used to make biodiesel, which behaves similarly to petroleum-based diesel.

So far, you have focused on acids that donate a single hydrogen ion in an acid-base reaction. Now turn to polyprotic acids - those that donate more than one proton per molecule. Investigate the complex ionization processes that ensue, and see how they play a role in regulating blood pH.

Build on your understanding of aromatics by investigating a very useful class of reactions: electrophilic aromatic substitution. What's the general mechanism by which these reactions occur? What are some of the many modifications chemists can make to benzene? What role did this reaction play in the synthesis of one of the most infamous organic compounds of all time, DDT?

In the first of five lectures on chemical bonds, start to unravel the mystery of what joins atoms into molecules. Investigate how molecular bonds reflect the octet rule encountered in Lecture 7 and fall into four classes: ionic, covalent, polar covalent, and metallic bonds.

Human beings have interacted with elements since prehistoric times. Yet large-scale efforts to organize these elements did not come about until the 19th century. In this lesson, become acquainted with the periodic table. Learn about its basic organizing principles and allow Ron to take you on a quick tour of its evolution through time.

Professor Davis introduces you to ribose, the central component of both RNA and DNA. Starting from individual molecules and motifs, you'll progressively work your way up toward a full model for the structure of the sub-units involved in our genetic code. This lecture is proof of organic chemistry's powerful role in establishing who you are.

Starting with hydrogen, see how electrons organize themselves within the atom, depending on their energy state. Graduate from Niels Bohr's revolutionary model of the atom to Erwin Schrödinger's even more precise theory. Then, chart different electron configurations in heavier and heavier atoms.

Proteins make up 20 percent of your body's mass. They mediate almost every chemical reaction in the human body, and they're found in everything from medicine to detergents. Here, make sense of the intricate, beautiful structures and interactions of proteins. Also, take a peek at how they're created in labs for further study.

Shifting gears, spend some time on the first and smallest row of the periodic table. Consider some important questions: What do two of the oldest, lightest elements-hydrogen and helium-have in common? How do they differ? And would they make sense somewhere else on the periodic table, given their particular characteristics and behaviors?

The valley at the middle of the periodic table features one-third of naturally occurring elements-all of which are metals. What do they have in common and what sets them apart? Take an introductory tour of the d-block metals from the poisonous to the ultra-dense before spending the next few lessons exploring three groups of transition metals in detail.