• wise_pancake
    link
    fedilink
    English
    arrow-up
    2
    ·
    22 days ago

    Do you guys have to memorize fluorine too?

    It’s been a decade since I took chemistry, and I did not get very good marks in it, but it seems like the elements at the bottom of the table (with exception to Uranium and Plutonium) are just hanging out while the top elements do all the work.

    • ArbitraryValue@sh.itjust.works
      link
      fedilink
      English
      arrow-up
      4
      ·
      edit-2
      22 days ago

      Fluorine is extremely rare in biological systems. (I was going to say “never” but I looked it up and apparently there are a couple of exotic compounds that have it.) However, fluorine is a component of many man-made drugs and poisons. Halogens are generally not incorporated directly into bio-molecules (with exceptions, the chief one being iodine in thyroid hormones) but chlorine plays an essential role in all living things as a free, negatively charged ion.

      Some heavier, metallic elements in the form of ions are necessary for the function of many enzymes, but biological systems can’t work with chemically bound metals the way that human technology can. I looked up what the heaviest element with a biological role is and the answer is apparently tungsten (although I’ve never come across an enzyme incorporating tungsten during the course of my work) but even heavier metals can act as poisons by taking the place of lighter, catalytically active metals in enzymes.

      It can be fun to look at the Wikipedia article of some weird element that never seems to be mentioned and see what strange uses humans have actually found for it.

      • ornery_chemist@mander.xyz
        link
        fedilink
        English
        arrow-up
        1
        ·
        edit-2
        22 days ago

        But… but… muh thulium…

        jk all lanthanides are the same don’t @ me physicists

        also Ce(IV) catalyst stans

        also also total synthesis tryhards who think SmI2 is ever the right call