The Aufbau principle | Atomic structure and properties | AP Chemistry | Khan Academy

Three-dimensional bond-line structures | Structure and bonding | Organic chemistry | Khan Academy

Spray Foam Insulation Kit: Satisfying Chemical Reaction

Cigarette Timer Fuse: Extreme COMBUSTION DELAY! 🔥🧨🪔😄 Smoking is injurious to health🫁

We don’t use deodorant… Smell isn’t something to be ashamed of. It’s a form of biofeedback. A signal designed to guide you. But most of us were taught to suppress it. To cover it up with synthetic fragrances, chemical antiperspirants, or even “cleaner” options like salt rocks. We used to use those too. And yes, potassium alum is a healthier alternative to most antiperspirants, which plug your sweat glands and block perspiration entirely. But it’s still an aluminum salt. And it still creates a ch