Daily Archives: May 5, 2014

I’ll be finished in a jiffy! What does that mean? What is a jiffy anyway? A jiffy is a measure of time. Sometime in the 18th Century, a jiffy was slang for ‘lightning’. In the 20th Century, American chemist, Gilbert Lewis proposed the jiffy should be the time it takes […]

What Is a Jiffy?

EDIT : This table has been updated to include corrections to include corrections to the atomic masses of iron and gallium. The improved table can be found at Color Printable Periodic Table Wallpaper with Oxidation States. This color periodic table contains the number, symbol, name, atomic mass and most common […]

Downloadable Periodic Table – Element Charges

Vinegar and Baking Soda Volcano
There is more than one way to make a chemical volcano. Actually, there are several methods. Here are some of the best, from the tried-and-true baking soda and vinegar volcano to the most exotic dry ice volcano. Make the Volcano Cone You can use a bottle or can or really […]

5 Ways To Make a Volcano

Current solar cell technology uses a perovskite crystalline form containing lead, methylammonium (CH3HN3), and a halogen as the light-absorbing material. Organo-lead halide crystals are responsible for the recent increase in solar cell efficiency gains. Today’s cells work around the 35% efficiency point. The only problem is all the lead found in […]

Getting The Lead Out Of Solar Cells