An astatide is a binary compound of astatine and another element.
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Cesium astatide (CsAt) is soluble because astatide ions (At-) are larger in size and have significant polarizability, leading to easily breakable ion-ion interactions. Additionally, the strong polarizability of astatide ions allows for them to form favorable interactions with solvent molecules, enhancing solubility.
The chemical name for ZnAt2 is zinc diastatide.
Silver astatide is most likely a silver or metallic color due to its composition of silver and astatine. Its exact color may vary depending on the specific conditions and environment in which it is observed.
Astatine can react with iron, forming astatide ions (At-) in aqueous solutions. This reaction is rare and not well studied due to astatine's scarcity and radioactivity. The astatine ion would likely displace another halogen ion in a salt with iron, similar to reactions with other halogens like iodine.
Some compounds that can be made with astatine include hydrogen astatide (HAt), astatine monochloride (AtCl), astatine monobromide (AtBr), astatine monofluoride (AtF), and astatine trioxide (At2O3).