Everything Matters | Selenium

How little is too little, and how much is too much? Essential to all animal life, but poisonous in large doses, the selenium has proven useful (but then often toxic) for a variety of industries and crafts over time. Get the scoop on this common, complicated element with Ron Hipschman at Everything Matters: Selenium.
The periodic table outlines the fundamental building blocks of all known matter in the universe. Composed of irreducible atoms, these elements arrived from the earliest reports of the Big Bang, the fusion wombs of stars and supernova, and collisions between interstellar matter and cosmic rays-as well as through artificial production in the lab. A scant 4.9% of the universe (the rest being dark matter and energy), the 118 elements currently arrayed on the periodic table display unique and yet beautifully related properties and behaviors. To us, they mean everything: from iron to uranium, their discovery and use have shaped the course of human history.
In this Thursday night series, we invite you to come be in your elements with Exploratorium host and scientific raconteur Ron Hipschman. Follow tales of intrigue and invention, join in dynamic demonstrations, and uncover fascinating connections between individual elements and our collective experience.

[@karlbergen6826]

Selenium firms a whole series on salts based on Selenic acid, H2SeO4. Selenic acid is analogous to sulphuric acid but more oxidizing. Selenates are analogous to sulfates but somewhat less soluble in water. Selenites based on selenous acid are more stable then sulphites.
Selenium is a chalcogen like oxygen and sulfur and forms non stoichiometric compounds with transition metals like oxygen and sulfur. These don't obey the law of definite proportions exactly but still follow it approximately.
Note for your channel: Do a playlist on your series about elements on the periodic table.

[@andrewkingjr.6356]

Very interesting!!!

[@baraskparas9559]

Fantastic presentation by a champion speaker. Thank you so much. In the cells Selenium can be stored more safely as selenocystine, a dimer of selenocysteine. Together with the low concentrations in the body it means that it is not poisonous unless taken excessively, unless we use "poisonous" in the same sense as an overdose of caffeine, alcohol or nicotine.

[@andrewkingjr.6356]

… where do I find the rest of the tales of the periodic table???

[@vers1fier]

23:42 This is why I like to call it conventional photography over film photography!

[@pankajravaliya7651]

If this selenium is to melt liquid thi without heating sir to do so

[@brfisher1123]

*HELP!!* I can't find any "Everything Matters" videos from bromine onwards!! :(

[@jensonsamraj347]

Hats off from India

[@neeravdoshi3418]

Hy does anyone knows how to produce selenium granules ?

[@queensofthedthrone8267]

I accidentally posted this on arsenic, but dang, THIS was the end of the series? A remarkable job nonetheless.

[@aghamdahri7714]

Sir .what are healrh benefits of selenium.hope you will repl

[@karlbergen6826]

Selenium, in proper amounts prevents some cancers. An enzyme in the body requires four -Se-H groups.

[@karlbergen6826]

innhv

[@nickv619]

Interesting

[@dol--lod282]

Hello, please upload the rest of the series.. It's very nice :)

[@exploratorium]

This is a ongoing series recorded live at the Exploratorium. We upload each episode the day after it is presented to our live audience. www.exploratorium.edu/visit/calendar/everything-matters

[@Jay_Flippen]

@@exploratorium No elements after selenium have been uploaded to both the exploratorium website and CZcams. :( Everything in Everything Matters matters.

[@EnergyTRE]

😂😂 quantum dots 😂😂 emf wave length sounds much more accurate.

[@bussi7859]

Blablablabla

[@nickv619]

Interesting