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January 9th is Richard Abegg's birthday. Abegg was a German chemist who was one of the early researchers of valence theory. His experiments showed a tendency between maximum of minimum valence levels of elements differed usually by a value of eight. This relationship became known as Abegg's rule when Gilbert Lewis proposed his octet rules. Abegg was also an avid enthusiast of ballooning. This hobby would ultimately cause his death when he flew his balloon with an engineer and female relative. When the balloon encountered strong winds, they opened the gas valves to cause the balloon to descend. It reached the ground safely and the other two were able to exit the basket. Abegg was caught as a gust of wind as he exited and was crushed by the basket.

First off, I found this great list of all of the science fairs in the world that have webpages. The list gets updated regularly. It is organized according to subject and geographical location. So... if you don't know where to find a science fair, start there. Once you find a science fair, you'll want to make the most of your experience. Good grades and prizes are nice, too. I've written about project ideas, but you also need to think about what judges will look for when it comes to rating your project. Here's a quick rundown: •Did you use the scientific method? Experiments and designs that solve a problem will get higher ratings than models or demonstrations. •Could you explain your project without reading it off of your display? Basically this shows that you actually did your project as opposed to getting too much help from a parent or teacher. •Did you seem friendly? Were you interested in and excited about your project? Enthusiasm and a willingness to answer questio...

You can tell when milk is bad and you probably have an idea of when to throw out the mayo in your fridge, but you may be unaware of the shelf life of other common household chemicals. For example, did you know hydrogen peroxide is only good for about a month once you've opened it? Gas which contains ethanol is at its best for only a few weeks Some common everyday chemicals last indefinitely, but others have a shelf life. This is a table of expiration dates for several household chemicals. In some cases, the chemicals have a shelf life because the product accumulates bacteria or breaks down into other chemicals, rendering it ineffective or potentially dangerous. In other cases, the expiration date is related to diminished effectiveness over time. Expiration Dates for Common Chemicals Chemical Expiration Date air freshener spray 2 years antifreeze, mixed 1 to 5 years antifreeze, concentrated indefintely baking powder unopened, indefinitely if properly stored opened, test by mixing ...