Topic: chemistry

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The Elements with 4 new elements – Helen Arney

There are four new elements on the Periodic Table: Nihonium (Nh), Moscovium (Mc), Tennessine (Ts), and Oganesson (Og) for elements 113, 115, 117, and 118 respectively. The International Union of Pure and Applied Chemi...

Toothpaste – Ingredients With George Zaidan

Cultures throughout history have tried a variety of things to clean their teeth... Egyptians and Babylonians brushed with twigs around 3500-3000 BC. In 5000 BC, a recipe of ox hooves, eggshells, myrrh, and pumice woul...

The Chemistry of Skunk Spray

Skunks are infamous for their awful-smelling odor, but they don't always smell that way. Their spray, a liquid full of stinky chemicals from their anal scent glands, is used strategically to chase away predators. In t...

A Sketchy History Of Pencil Lead

When fifth-graders at Green Acres Elementary in Lebanon, Oregon asked the NPR Skunk Bear team how pencil lead was made, they looked into it... way into it. From the start of the universe (with a shout out to Carl Saga...

Elemental Burning – Beauty of Science

What happens to carbon when it combusts? What does sodium look like while it burns? In Elemental Burning, creator Yan Liang's team films the combustion of five elements: carbon, sodium, phosphorus, magnesium, and sulf...

Crystallization2, a 4K macro time lapse

The subjects of this project were droplets of saturated aqueous solutions containing various inorganic salts (e.g. table salt, sodium sulfate etc.). The evaporation of water initiated the crystallization processes ins...

Matchsticks – How It’s Made

Tiny sticks of wood, each with a droplet of red compound liquid drying on its end, traveling together en mass through a metal matchstick making machine. This is how commercial safety matches are made, via the Science ...

Edible milk-based packaging may replace plastic in three years

At the grocery store, most foods — meats, breads, cheeses, snacks — come wrapped in plastic packaging. Not only does this create a lot of non-recyclable, non-biodegradable waste, but thin plastic films are not great a...

The Man Who Put the Pee in Phosphorus

In the 1660's, German alchemist Hennig Brand thought he knew the secret to making solid gold: pee. So set was he on these golden ambitions, he dehydrated 1,500 gallons (gallons!) of human urine to make it happen. Thou...

How do we know what stars are made of?

How do astronomers know what stars are made of when those stars are light years away from Earth? These demonstrations by Dr Francisco Diego reveal the colors of light that are produced from sodium chloride, rubidium c...

Concrete Does Not Dry Out – Minute Physics

If you've ever made pasta, you know what happens when you drop the noodles into a boiling pot: They absorb the water. Why? Pasta dries from an elastic dough as its water content evaporates. Compare this to concrete, "...

Chemical Bouillon, a series of visually abstract chemical reactions

Hydrocarbon vs Ink - Implosion, above, from the Chemical Bouillon video series, "an artistic project studying the graphic aspect of chemical reactions" created by Antoine Delach, Valere Amirault, and Teurk in Paris, F...

Ferrofluid + Glow Sticks – The Physics Girl

Ferromagnetic + fluid = ferrofluid, a liquid containing nanoscale particles of magnetite, hematite, or an iron compound. Invented by NASA's Steve Papell in 1963, ferrofluid forms undulating spikes and patterns as it r...

The Real Reason Leaves Change Color In the Fall – MinuteEarth

Every autumn, green chlorophyll fades from the leaves of deciduous trees, revealing the underlying reds, oranges, and yellows. But why does the chlorophyll fade in the first place? Recycling! MinuteEarth explains. ...

What is Fire? – It’s Okay to Be Smart

That glowing light, those information-filled colors, that smoke and vapor that seems to magically light warm embers... What kind of physics and chemistry are at work inside of a flame? Joe Hanson from It's Okay to Be ...

Explore the Science Behind Fireworks—and the Galaxy

When you watch fireworks burst with color, you're seeing examples of how stars and galaxies work: Blues from copper, yellows from sodium, bright whites from aluminum, barium greens, and reds made from strontium... The...

Anodizing Titanium – “The Rainbow Metal”

Titanium is nicknamed "The Rainbow Metal" in some jeweler circles because it can be anodized in an electrolyte solution to produce a variety of colors. The colors are created by passing electricity through it to produ...

A solid, liquid, & gas at the same time – The Triple Point

How can a chemical be a solid, a liquid, and a gas at the same time? In the video above, a clear liquid called cyclohexane is experiencing the perfect pressure and temperature combination for its solid, liquid, and ga...

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