Caesium or cesium11/22/2023 ![]() Where is caesium found?Ĭaesium is a relatively rare element that occurs in Earth’s crust at an average of 3 ppm. The other radioisotope Cs-137 is extracted from the waste obtained from nuclear power reactors. ![]() It is discovered through flame spectroscopy analysis. Due to its rarity, it's best to recycle caesium.In 1860, caesium was discovered by German chemist Robert Bunsen and physicist Gustav Kirchhoff. It is best to leave it in air (or in a CO 2 atmosphere, as there's a less risk of fire) to turn into oxide, hydroxide and carbonate, that can be safely disposed of. The best way to handle metallic cesium is in a glove box filled with inert gas, such as argon.Ĭesium metal cannot be safely neutralized by dissolving it in isopropanol, like sodium, as the reaction is just as violent as the one with water. While it can be stored under mineral oil, it will oxidize much faster than lithium, sodium or potassium, so it is best stored in vacuum containers or argon ampoules. In its ionic form, caesium ions are extremely similar to potassium and rubidium ions, and its toxicity is just as low as the mentioned elements. Cesium will not usually catch fire just by being exposed to air, but friction, heating, or exposure to water can trigger a fire or explosion. This boiling, however, tends to drive isolation reactions forward by increasing entropy.Ĭaesium metal is extremely reactive and pyrophoric in air. Caesium chloride for example, melts at at 645 ☌, while cesium metal boils at 671 ☌, so without a sensitive temperature controller there's a risk of boiling the metal. Purer caesium metal can also be prepared by decomposing caesium azide in vacuum at 390 ☌, which is prepared from caesium sulfate and barium azide.Įlectrolytic preparation of elemental cesium is extremely difficult. YouTube vlogger thunderf00t has performed this preparation, as it seems to be much cheaper to perform this extraction than it is to buy the metal (but it is far more convenient to just buy the metal). One way is to reduce caesium halides with a reactive metal such as calcium, barium, or lithium at 700-800 ☌, followed by distillation of the caesium metal. Ĭesium compounds, such as cesium formate, are used as drilling fluids.īecause it's extremely reactive, isolating pure caesium metal is extremely difficult. The exact composition of the alloy varies, depending on the generation of tube, as not all of them have cesium. Very small amounts of cesium alloys are used in the cathode of the electron gun from the cathode ray tube TVs. Another seller, SmartElements sells cesium ampoules cheaper, a 10 g ampoule is 179 € while a 1 g ampoule is only 79 €. It will react with water even at temperatures as low as −116 ☌.Ĭesium ampoules can be purchased from GalliumSource, however it is extremely expensive, a 100 g ampoule is 2400 $ and a small 1 g one is 140 $. It is the least electronegative element and is extremely reactive and even pyrophoric. It has a very low melting point of 28 ☌, meaning it can be a liquid at near room temperature or if held in one's hand. ![]()
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Tetris twitch11/22/2023 ![]() You can also tag or DM me (I'm "Professor L" on Discord) if something is urgent. The best place for suggestions is in the dedicated channel in the CTM Discord Server. I also regularly check Discord, so if you don't have a GitHub account but have suggestions, I can be contacted there. So feel free to open an issue here on GitHub with any suggestions or bug reports. We are also very open to community input, since that's of course the best way to improve a project like this. A web interface at go.ctm.gg, providing web-based tournament orchestration tooling for CTMĪ semi-full list of commands can be found in the COMMANDS.md file.Other personal information storage (preferred name, country, etc.).Here are some of the greater features the bot supports: See also: our newest Classic Tetris project, ctdb Major Features It is currently being run on a cloud computing instance rather than a home PC, and as such its uptime is drastically improved from the strikingly mediocre former bot. We stand firmly against AI-generated art and NFTs.This repository is a new and improved bot for Classic Tetris Monthly that is designed to be accessible to the whole community, both in and out of CTM contexts. Sometimes it's a radical act to make dark or upsetting art, and sometimes it's radical to make hopeful art in times of adversity. We actively avoid hateful content, bigotry, and developers who have been exploitative or otherwise abusive, and we encourage developers to use their voices to support worthy causes. We believe everything, especially the media we create and consume, is political. Every game fills a niche, and while our group focuses on highlighting games in one of those niches, we all play and love games that aren't part of the genre too. Not at all! "Wholesome Games" is not a synonym for "good games" and we believe every type of game can-and should-co-exist, including the scary and violent games that we don't curate. We want to make absolutely clear that our values are diametrically opposed to these uses, and we can only hope that's reflected in our work. Honestly, so do we sometimes! Toxic positivity is a real problem, and lots of words and ideas like "wholesome" (or "family values") have been warped into dog whistles and harmful purity tests, or used to dismiss serious concerns. The question of what makes a game wholesome is one that comes up again and again in our community, and while common themes sometimes emerge from those conversations, we think it devalues the discussion to suggest that there's ever going to be a comprehensive final answer. If a game is cute and cozy but contains harmful stereotypes, is it wholesome? We say no! If a game is violent, but that violence is about overthrowing an oppressor, is it unwholesome? We say no! The opinions presented by our curation are just that: one group's opinions. ![]() Something we've always tried to be mindful of is that what looks wholesome to one person might not look wholesome to someone else. That's up to you to decide! It's subjective and we don't want to pretend that it isn't. We want to be a part of showcasing the breadth of experiences that games can have for players. For many years, the most critically acclaimed titles have been the ones with the darkest themes and grimmest depictions of life, but there's also a whole world of hopeful video games with rich storytelling, innovative gameplay, and beautiful art and sound. ![]() One of the goals of Wholesome Games is to change how we think about which games are taken seriously. Since then, the community has grown to nearly 500k members across Twitter, Discord, TikTok, YouTube, and more. Wholesome Games is a community that started on Twitter when indie game developer Matthew Taylor began curating games according to their feelings of comfort, compassion, and coziness. How did you know!? What is Wholesome Games? We've got them all archived in this YouTube playlist! Can we co-stream your events? Where can I view past Wholesome Games events? AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |