You know that great feeling after eating a big meal and becoming full? Or the positive feeling after losing a little extra negative weight?  Atoms are like that too!  In this interactive, you'll see how atoms with a nearly full outer shell can take on a couple electrons to complete themselves, or shed some electrons if they have a nearly empty shell, and how the charges change.

Now available with a Concept Checker.

They say a pot watched never boils.  Well, this one will, and you'll definitely want to watch it!  The Phase Change Lab demonstrates the phase changes of water in a heated pot, starting from solid ice and eventually making it's way to the gaseous state, all while showing intermolecular forces and the time/temperature for you to graph out later.

Now available with a Concept Checker.
 

You've been assigned the job of running the production line at the ammonia factory. Your goal is to identify the design parameters that will increase the daily yield of ammonia. You can modify reactor temperatures and pressures and the nitrogen and hydrogen flow rates and observe the effect upon percent yield, daily ammonia production, your carbon footprint, and safety risks. Get started quick because your job ends in 180 days. Good luck!

Need a gas-filled cylinder equipped with a piston? How about a thermometer, a pressure gauge, and a means of determining the volume and the number of moles of gas inside the cylinder? No worries because we have you covered with our Ideal Gas Behavior simulation. Set up your initial state of the gas, identify your constraints (e.g., constant T, constant V, etc.), modify a variable and observe the effect on other variables.