who is the father of the modern periodic table This is a topic that many people are looking for. star-trek-voyager.net is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, star-trek-voyager.net would like to introduce to you The genius of Mendeleevs periodic table – Lou Serico. Following along are instructions in the video below:
Tom carter reviewer bedirhan cinar. The periodic table is instantly recognizable. Its not just just in every chemistry lab worldwide.
Its found on t shirts. Coffee mugs and curtains. But the periodic table isnt just another trendy icon.
Its a massive slab of human genius. Up there with the taj mahal. The mona lisa.
And the ice cream sandwich. And the tables creator. Dmitri mendeleev.
Is a bonafide science hall of famer.
But why whats so great about him and his table is it because he made a comprehensive list of the known elements nah. You dont earn a spot in science valhalla. Just for making a list besides mendeleev was far from the first person to do that is it because mendeleev arranged elements with similar properties together.
Not really that had already been done too. So what was mendeleevs genius. Lets look at one of the first versions of the periodic table from around 1870 here.
We see elements designated by their two letter symbols arranged in a table check out the entry of the third column fifth row theres a dash there from that unassuming placeholder springs. The raw brilliance of mendeleev that dash is science by putting that dash there dmitri was making a bold statement. He said.
And im paraphrasing here yall. Havent discovered this element yet in the meantime. Im going to give it a name its one step away from aluminum.
So well call it eka aluminum eka being sanskrit for one nobodys found eka aluminum yet so we dont know anything about it right wrong based on where its located i can tell you all about it first of all an atom of eka aluminum has an atomic weight of 68 about 68 times heavier than a hydrogen atom when eka aluminum is isolated youll see its a solid metal at room temperature.
Its shiny. It conducts heat. Really well it can be flattened into a sheet stretched into a wire.
But its melting point is low like freakishly low oh and a cubic centimeter of it will weigh six grams. Mendeleev could predict all of these things simply from where the blank spot was and his understanding of how the elements surrounding it behave a few years after this prediction. A french guy named paul emile.
Lecoq de boisbaudran discovered a new element in ore samples and named it gallium after gaul. The historical name for france. Gallium is one step away from aluminum on the periodic table.
Its eka. Aluminum so were mendeleevs predictions right galliums. Atomic weight.
6972 a cubic centimeter of it. Weighs. 59.
Grams. Its a solid metal at room temperature. But it melts at a paltry 30 degrees celcius 85 degrees fahrenheit.
It melts in your mouth and in your hand not only did mendeleev completely nail gallium. He predicted other elements that were unknown at the time scandium germanium rhenium. The element.
He called eka manganese is now called technetium technetium is so rare it couldnt be isolated until it was synthesized in a cyclotron in 1937. Almost 70 years after. Dmitri predicted.
Its existence 30 years after he died.
Dmitri. Died. Without a nobel prize in 1907.
But he wound up. Receiving a much more exclusive honor in 1955. Scientists at uc berkeley.
Successfully created 17. Atoms of a previously undiscovered element. This element.
Filled an empty spot in the perodic table at number 101. And was officially named mendelevium in 1963. There have been well over 800 nobel prize winners.
But only 15 scientists have an element named after them so the next time you stare at a periodic table. Whether its on the wall of a university classroom or on a five dollar coffee mug dmitri mendeleev the architect of the periodic table will be staring back .
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