Chemist here: all the reds are correct but it would take so much time to explain why so many of the greens are super concerning. Every time I see this reposted it's so concerning...I should just spend the 17 minutes and save a copy pasta response of everything horribly wrong with this.
I have elemental magnesium (4 ~50g ingots, I keep it in my library in a barely-sealed ziplock). it's shelf stable and doesn't react violently with water. Want me to try licking it and let you know? (hint: at worst it'll make a minuscule amount of milk of magnesia)
ETA: Would I stick my tongue in pyrophoric magnesium powder? No, and you wouldn't do that with pyrophoric aluminum or zinc powders, either, but that doesn't stop me from using (or licking) alumnum foil. Proof: https://invidious.darkness.services/watch?v=Q_4I30Nz_b0
Elemental mercury isn't very bioavailable so licking the surface of a pool of mercury isn't going to hurt you much if at all. (Assuming you just do it once). Plus the density of mercury is going make it hard for you to slurp up a significant quantity the stuff anyway.
If you want to know about the horrible potential for mercury to mess you up look for stories about dimethyl mercury exposure. Its the fat soluble varieties that give mercury it's reputation.
I think it's framed in the context of: "How dangerous would a single molecule be to a human?". In that context, I would say O is safe, only because our body naturally destroys the radical oxygen molecules every day that we create with our anti-oxidants.
True, in a larger quantity than our body can handle, it's extremely toxic; but a single molecule would probably not be too bad.
But I do agree, it shouldn't be Green. It should be Yellow at least.
Same concern. It's even arguable you can only lick solids (and lap liquids). This would make hydrogen a Must Not Lick, for example, if we could only consider solid forms.
Why? Bismuth is pretty harmless from what I can find. It's not great but it's way better than lead (which it replaced in a lot of applications). Based on what I read, bismuth probably wouldn't hurt you if you gave it a lick.
lol You don’t need a table to tell you whether or not you should like an element. Like ‘em all! Also, whoever made the pic misspelled “like” as “lick”. jsyk.
lead's bad for you, sure, but when some of the other metals on this scale's red might literally explode your tongue/face/head depending on sample size and saliva accumulation, i'd say yellow fits it pretty well.
Nah, metallic lead is pretty solid. Licking it doesn't really do much. You shouldn't ingest lead, but you don't really ingest it by licking a piece of metal.