Those bracelets that say they'll fix all your health problems using negative ions?
I always assumed they were a scam because ions (an atom with an electron imbalance) really really hate existing and are hard to make.
Lots of ions are ok in water because water is super polar (oxygen hogs all the electrons so every molecule is like a tiny magnet) and therefore they'll soak up all the imbalanced charges.
Go pour salt in water right now. If it dissolves you've created negative chlorine ions! (And an equal number of positive sodium ions)! Good job on being a scientist.
But in air? Nothing polar to stabilise them.
Go pour salt on your table. It stays a solid? Good job. You've proven the atoms in salt prefer being bonded to each other than being free flying ions. You're half way to a chemistry degree.
The only way to force the creation of ions in air is a fuckton of energy. This can be electricity or radiation.
Go attach leads to a 9V battery. Put both into a cup of water. If you see bubbles you've successfully split water into hydrogen and oxygen. The oxygen will be on the positive lead because oxygen ions are negative. The hydrogen will be on the negative clip because hydrogen ions are positive. There will also be more bubbles because water has twice as many hydrogen atoms as oxygen atoms. These bubbles won't be ions though, because again, ions hate existing so they recombine into oxygen and hydrogen gas almost instantly. Still. You did technically make negative ions for a split second. Good job.
But most of those negative ion bracelets don't have batteries (which again, only make ions for a split second and require a renewable resource like water to do that with). So they must be a scam right? They're just rocks!
Nope. Remember the other way to make ions? It was radiation! Those bracelets and necklaces you're supposed to wear 24/7 to keep yourself healthy? They're made of mildly radioactive stone.
So they are splitting the air into ions (for a split second. You now know that ions hate existing so they recombine. Although sometimes they'll recombine into ozone (O3) rather than breathable oxygen (O2). Ozone isn't great to breathe in but you also presumably have been near a car so like... It's not a big deal in the scheme of things).
But more importantly!! They're also splitting your body into ions! Which are stabilised by the water in your body (remember the magnet analogy?) and therefore last a lot longer and can get up to more fuckery.
To;dr the negative ion bracelets do what they say on the label. They just do it by dosing you with radiation. And unlike just walking past a radioactive rock or getting an x-ray or a particularly sunny day, they're doing it on a concentrated part of your body, for as long as you're wearing it. And you're supposed to give these to children!!!
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