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So, chemistry is all theory, right?
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Using high-resolution atomic force microscopy, a hydrogen bond has been imaged for the first time. This technique is quite similar to the one used to photograph bonds breaking and reforming that was announced earlier this year.
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4760 |
savio |
10 years ago |
We are the stars, we are the universe
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I'd like to share this mind-opening video. Astrophysicist Dr. Neil DeGrasse Tyson was asked by a reader of TIME magazine, "What is the most astounding fact you can share with us about the Universe?" This is his answer. By far, one of the best...
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4530 |
ehd123 |
9 years ago |
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24662 |
ehd123 |
9 years ago |
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2686 |
ehd123 |
9 years ago |
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2187 |
ehd123 |
9 years ago |
Ice spikes
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Have you forgotten your water properties? Check out the video for a review and an explanation as to why ice spikes form.
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1788 |
ehd123 |
9 years ago |
Metal melts in your hand almost instantly
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Gallium is a silvery metal with atomic number 31. It is used in semiconductors and LEDs, but the cool thing about it is its melting point, which is only about 85 degrees Fahrenheit. If you hold a solid gallium crystal in your hand, your body heat will cause it to slowly melt into a silvery metallic puddle. Pour it into a dish, and it freezes back into a solid. While you probably should not lick your fingers after playing with it, gallium is not toxic and it will not make you crazy like mercury does. And if you get tired of it, you can melt it onto glass and make yourself a mirror. ...
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6976 |
duddy |
11 years ago |
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6051 |
duddy |
11 years ago |
Cheat like a pro
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Here's a fun way to cheat on your next biochemistry exam
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2970 |
duddy |
11 years ago |
Molecules that bloom like flowers
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By manipulating chemical gradients in a beaker of fluid, the behavior of crystal growth can be controlled, creating precisely tailored structures – “flowers” at the scale of microns – that bloom in a beaker. Though these minuscule sculptures don't resemble the cubic or jagged forms normally associated with crystals, they “bloom” from the surface of a submerged glass slide, assembling themselves one molecule at a time. The precipitation of the crystals depends on a reaction of compounds that are diffusing through a liquid solution. The crystals grow toward or away from certain chemical gradients as the pH of the reaction shifts back and forth. The conditions of the reaction dictate whether the structure resembles broad, radiating leaves, a thi ...
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3281 |
duddy |
11 years ago |
Molecules in high resolution
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This image shows 26 carbon atoms and 14 hydrogen atoms rearranging bonds. There has never been an image of a single bond resolve at this level of detail so close to the reaction time before.
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4553 |
duddy |
11 years ago |
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4874 |
duddy |
11 years ago |
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3395 |
duddy |
11 years ago |
Cool shiny metal
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This is bismuth, a brittle metal with a white or silver-pink hue and an iridescent oxide tarnish that produces a rainbow of colours from yellow to blue. It is the most naturally diamagnetic metal in the world, which means it can create a magnetic field in opposition to an externally applied magnetic field. ...
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3655 |
duddy |
10 years ago |
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2637 |
duddy |
10 years ago |