DescriptionElectron shell 127 Unbiseptium.svg English: Electron configuration for this chemical element (predicted) Date 22 October 2012, 18:16:50 Source...
https://creativecommons.org/licenses/by-sa/2.0/uk/deed.enCC BY-SA 2.0 ukCreative Commons Attribution-Share Alike 2.0 uktruetrue Electron shell - no label English...