That's one thing that annoys me about lithium batteries. Every time there's an EV fire, people pop out of the woodwork to shit on the FD for using water to put it out.
Just because the name has lithium in it doesn't mean it's elemental lithium.
It’s a situation of just enough knowledge, I think. It’s true that water won’t put out an EV battery fire, but it will cool it down and prevent the fire from spreading.
I guess it depends on what burns. Water is conductive, so you might not want to use it to put out an electrical fire because of the risk of electrocution.
Lithium batteries contain little to no elemental lithium. They normally contain lithium cobalt oxide, lithium iron phosphate, or lithium nickel manganese cobalt oxide as the anode, and a lithium salt as the electrolyte.
Water is about the only way to put one out because it's an exothermic reaction (water is to cool it down so it stops), and two out of the three are self-oxidizing so you can't just smother it.
The biggest danger of a lithium battery getting wet is that it shorts, which can lead to a fire because it goes into thermal runaway. But this can happen if you have one in your pocket with spare change (most of the vape fires in the 2010s were this)
Sodium Chloride is just chilling as a rock or in suspension and then humans put a lot of energy into it, so it is forced to separate. Imagine you and your spouse being torn apart with a lot of violence.
Of course you get traumatized and act out until you get reunited and have some time to become chill again.
I know you wrote H and O, and not H2 and O2, but I'm going to assume the gas forms because those two substances pretty much cannot exist in their pure forms
And for those, O2 is necessary for our life, and H2 is non-toxic, it's just very flammable. So I don't know if the comparison fully works
Of course, you're right if you mean pure H and pure O, but, again, they will immediately combine to form a new substance
Salt is scarier than the elements sodium or chlorine because, according to Wikipedia, "Salt is essential for life in general." Without salt, there wouldn't be humans creating things like chlorine gas. Life is scary.
Fun fact; cats can drink straight seawater. Mad good kidneys or something, so the soup is going to get far too salty for a human before it gets too salty for a cat.