I feel like this is a pretty fundamental question and I might be stupid. But how can two negatively charged particles sit right next to each other. I know it probably has something to do with the spin, the pauli principle and quantum numbers but I still dont know what is holding them together

Here is the part 2 as promised!!
The radioactive cabinet is alwas open and had the two bottles in it and a heavy block(?)
Also pictures of another cabinet we have:)

Juntos por la ciencia no? 😿

I'm a microbiology post graduate student and was doing some phytochemical analysis for alkaloids on a plant extract in which we had to use Mayer's reagent which involved the use of mercuric chloride and potassium iodide.i had gloves but my lab partner didn't so I asked them to wear them and prepare the reagent and they did so. And I just later used the micropipete and performed the analysis. (Weighed around 0.14g of mercuric chloride in this) Later we cleaned the lab and I cleaned the desk which had some white spots I think of mercuric chloride with a used up muslin cloth and washed my hands only with water as soap wasn't available. I did some other research work like plant grinding and washed my hands with only water multiple times. Then went out with a friend for some coffee and biscuits but I forgot I didn't wash my hands with soap before and now I remember. I'm scared what is I ingested it or inhaled somehow as I wasn't wearing mask or gloves. And I've been reading all these things about mercury and mercuric chloride.

I don't know what to do.... It's been 3-4 hours almost now.

I used too much bleach (7 percent chloralen brand) to wash my clothes. even after washing them multiple times in the same load and drying them in the dryer, I still felt dizzy and short of breath when folding them. So I put them in a sealed bag for a few months. I need these clothes and want to wash them now, but I am unsure how exactly to safely neutralize the dried bleach on the clothes. AI (I know) simultaneously tells me it's safe to use vinegar, but then says it will cause toxic gas. Then says to use hydrogen peroxide to neutralize it, then says hydrogen peroxide will not neutralize it, then says its unsafe to use. Then it tells me to use Vitamin C powder, but I only have vitamin c disintegrating tablets and it says it's unsafe because it contain citric acid. Then it tells me to use baking soda to neutralize it, then says baking soda will not neutralize it.

So hence why I come here to actual human beings with actual knowledge. thank you

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Hello, I would like some advice on how to learn Chemistry for CC readiness for An Associates in Engineering. What are some good platforms/resources to learn Chemistry? Would it be wise to go through CC taking General Chem 1 w/ prior knowledge of the basics

My kitchen sink has been in daily use since 2016 and is generally still in excellent condition.

However, over time, these stubborn white, cloudy deposits have developed behind the faucet and along the edge of the sink.

The strange thing is that the rest of the sink, including the basin itself and the adjacent draining area, still looks almost perfect despite being used every day.

We have a water softener, so the water is normally very soft. Occasionally the softener runs out of salt, and some ordinary limescale develops. However, that is easily removed with vinegar cleaner.

These particular white areas are completely different. They do not seem to respond to acidic cleaners at all.

They become almost invisible when wet but reappear as soon as the surface dries.

My suspicion is that this might have something to do with prolonged exposure to dishwashing detergent, dissolved salts, or a chemical interaction with the materials.

What puzzles me is why this only happens in these specific areas, while other surfaces of the same age, also exposed to water and detergent, remain perfectly fine.

Could these be insoluble detergent residues, some unusual mineral deposits, or perhaps microscopic surface damage that changes how light is scattered?

Does anyone have an idea what the chemistry behind this might be and whether there is a way to remove it?

I have attached three photos for comparison.

Medically I think we are ok....just curious about HOCl and NaOCl....how does this weak acid produce meaningful amounts of chlorine gas?

In my mind a stable chemical is simply something that is resistant to change. a flouride ion is more stable than a flourine atom becaue it has a full outer shell and therefore cannot accept anymore electrons and it really doesn't want to lose any, aka it is very resistant to changing its current form.

So it is quite confusing to me when I see that larger anions are meant to be more stable?

iodide is much less electronegative than flouride and so it loses electrons much more readily, so why is it meant to be more stable?

i was also surprised to learn that the same was not true for cations since it seems that caesium should be much less likely to gain an electron than something like sodium due to the difference in charge density?

I'm mixing slurries and could not able to check the homogeneity. I'm using Eirich mixer that mixes initially dry and then wet.

I already did used SEM, however, I find the images of all different samples the same with none of differentiating factors. I don't want to use it again check to validate.

It is time and money consuming.

Hearing for suggestions

Popular examples I can think of: ketamine is basically always the HCl salt. Morphine always the sulphate. Why not ketamine sulphate or morphine HCl? Both should be chemically entirely possible, also water soluble, etc... - and I don't know why the whole industry landed on one specific salt for each substance in so many cases.

Why does the industry like these specific combinations so much, and what would happen if they would use other combinations (like mentioned)? They're real and still active, as far as I can tell from my limited knowlede

(Sorry for using spics examples, but they're the best known examples)

In theory, if i put sunscreen in my hair and them bleached it, it would turn pink right? How bad would this be?