# Tag Info

1

Did he know the mass of a hydrogen atom at the time? Because J.J. Thomson already discovered that electron is a lot lighter than a hydrogen atom (about 1800 I believe). The idea that the mass to charge ratio of cathode ray "particle" (modern day electron) is a lot lighter than hydrogen came about indirectly from electrochemical experiments and the ...

0

Yes, there are a large number of negatively charged metal ions, many of them containing several covalently bound atoms. The positively charged counterion is typically a group 1 metal. Wikipedia defines a zintl phase as the product of a reactio between a post transition metal or metalloid, but most of the examples are based on elements that are not ...

0

To make a capacitor out of metal, you have to have negatively charged metal atoms on one of the plates (although I guess one could argue that the negative charge is not tied to a particular atom, but shared among all the atoms).

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The electron affinity, defined as the energy released in the reaction $$\ce{X(g) + e^- -> X^- (g)}$$ is positive for all but the noble elements and a few elements with half-filled shells (see a data table here), which is consistent with the anion being more stable than the neutral atom. This makes it difficult to understand the motivation for the first ...

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Absolutely! You will find these mostly in electride systems and off these, mostly in alkali metals. Here is an example research paper: "Superakali-Alkalide Interactions and Ion Pairing in Low-Polarity Solvents, J. Am. Chem. Soc., 2021, 143(10), 3934–3943 (https://pubs.acs.org/doi/10.1021/jacs.1c00115) Remember, metals have a positive charged when ...

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