On the side here, we now know that it's everyĮight elements, but in the 1860s, elements were studies based At the beginning of the list of elements,Ĭharacteristics repeat every seven elements. But with a quick inspection, you, and to beįair, a number of other chemists, realize that there was a relationship betweenĪtomic weights, but it's periodic. Lithium, sodium, potassium, and rubidium wereĪll extremely prone to reacting with chlorine, fluorine, iodine, and bromine beryllium, magnesium, calcium, and strontium Seem to have nothing to do with the atomic weight. But interestingly, you, because you're a cleverpants, realized that the most significant relationships
So the simplest thing was just to sort them Known to mankind, and their atomic weights are mostly knownĪs well. So it's the 1860s, and about 60 elements are Let's all imagine we're Mendeleev again - I like doing that - and that we know a bunch of stuff about chemistry - which, you know, we don't, yet - but we're Work with at the time, and his knowledge gave him unique insights He worked with all the elements that you could Mendeleev spent a great deal of time in laboratories as a student, studying the burgeoning new field of chemistry. And maybe that's one reason why Dmitri Ivanovich Mendeleev became the crown jewel of Russian science, and a theorist who revolutionized how we see You might feel a tremendous debt to your mother, and a very deep desire to ensure that you achieve something on par with the sacrifices she made for you. If you're doing your imagining as I told you, Your mother, having completed her mission, promptly dies. Petersburg, to the school where your father had graduatedĪs a scientist, and as luck, or extreme, insane, undeniably Russian persistence, would have it, they accept you, and your saddle-worn butt, as a pupil.
So together, you ride another 400 miles to There, on your behalf, she pleads earnestlyĪnd effectively, and they reject you. So, with your siblings out of the house and on their own, she packs up your belongings, straps them to a horse, and with you in tow, rides 1200 miles through the Ural Mountains on horseback to a university in Moscow. But your mom, she sees your potential she knows that you have a keen scientific Your mom, to support the family, has re-opened an abandoned glassmaking factory in the small town where you live, largely because she wants to make enough money Gone blind, leaving your family of more than ten brothers and sisters destitute, has just died. And your father, who was a professor but had To start out, though, let's close our eyesĪnd pretend.
Today I want to talk a little bit about theĬreation of this table, which is, to be clear, one of the crowningĪchievements of human thought. Right here, nor the stone table of Aslan, NAY! It is the periodic table of elements, a concise, information-dense catalog of all of the different Of Independence, nor any table of contents, nor this table Not the table where they signed the Declaration Today, we're talking about the most important Hello, I'm Hank Green welcome to Crash CourseĬhemistry.
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