So if you examine that thing called the Periodic Table of Elements a little closer you will notice that there is an element located between Cadmium and Tin called Indium. As the 49th elements on this table it is considered to be a post transition metal. Discovered in 1863, through the exploration of Zinc ore. Used as a thin layer of lubrication and more recently as screens on touch smart cell phones. Here is the electron shell configeration:
| 1s2 | | | | | | | |
| 2s2 | | 2p6 | | | | | |
| 3s2 | | 3p6 | | 3d10 | | | |
| 4s2 | | 4p6 | | 4d10 | | | |
| 5s2 | | 5p1 | | | | | |
| | | | | | | |
| | | | | | |
Now this wonderful ground breaking element does not come without some strings attached. This element is toxic in many stages of its life. There are 3 main times where it is considered toxic to humans: 1) the manufacturing stage 2) the laying of Indium film stage and 3) the recycling stage. The only time Indium is really safe for human contact is when it is already in the completed stage.
Fun Fact:
Japan uses 45% of the world's Indium!