Monthly Archives: May 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?

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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

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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

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How well do you know the periodic table? The answer may surprise you. Download this PDF file and print out the blank table. Test yourself by filling out as many of the squares as you can. Check your answers with a filled out periodic table. If you’d rather have your table with […]

Blank Periodic Table

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The fork-tailed drongo is a common sight in the Kalahari Desert of Africa. These black birds give off a loud, easily identified cry when predators are around. This cry is distinctive enough, other animals will hear them and drop whatever they were doing to avoid danger. This watchdog bird is the […]

Watchdog Bird Lies To Get Free Meal

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This color periodic table contains the atomic number, symbol and name of each element. It also contains the current IUPAC accepted values for atomic mass of each element. This table lists the most significant figures available. This table is available for download as a PDF file. For best printing, choose Landscape and […]

Downloadable Periodic Table – Significant Figures

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