#chemistey

A good visualization of how dense liquid mercury is 👍🏼 Follow @reactionchamber for more chemistry experiments ⚗️ Mercury has a density of 14.184 g/cm3 at room temperature - lighter metals like aluminum, iron, or copper can thus easily float on it. Video by NileRed #science #chemistey #beaker #liquid #metal https://www.instagram.com/p/CBBW097DGy6/?igshid=cpp7l3jgt9qi

Have you ever seen what thermo-fluorescence looks like? 🦠 To understand why this happens one must first understand a little about fluorescence. The ultraviolet light is absorbed by the molecule and excites electrons in it to higher energy levels. Normally the molecule bumps into other molecules and looses this energy, dropping the electrons back into their ground levels. In fluorescent materials though, the electrons release their energy first as fluorescent light before they loose their energy through collisions. In trispyridine copper iodide, the molecules vibrate and collide too much at room temperature and thus destroy any chance of fluorescence, so the substance looks non-fluorescent. But if cooled low enough, the molecules vibrate less and thus the electrons have more opportunity to emit light before a collision. Video by @nurdrageyoutube #fluorescence #chemicalreaction #chemistey #uv #uvlight #colorchange #color #uvcolor #magical #magic https://www.instagram.com/p/CAA1r2dj3Lu/?igshid=1bwgg1sl1cjwp