Periodic Chart

Periodic Chart

Of all the tools available to chemists, the single most important tool is the Periodic Chart of the elements. To most people the chart is nothing more than a list of the elements in numerical sequence. Yet, to the well-informed student, there is much more information available.

Alkali Metals
Discoverer
Fundamental Particles
Isotopes
Java
Los Alamos National Laboratory
Mayan
Minerals
Shockwave
TouchSpin
Visual
Web Elements
Wood

Challenge | Puzzle

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Light

Light

Light’s Most Exotic Trick Yet: So Fast it Goes … Backwards?

As if to defy common sense, the backward-moving pulse of light travels faster than light.

Confused? You’re not alone.

“It’s weird stuff,” says Boyd. “We sent a pulse through an optical fiber, and before its peak even entered the fiber, it was exiting the other end.”

“I know this all sounds weird, but this is the way the world works.”