4 posts • Page 1 of 1
The f block is a series of elements that would enter between group three and group four. The reason these elements are in the f block is because one or more of their outermost electrons is in the f orbital. If you were add the f block elements to the periodic table, it would expand in width.
The f block starts filling 2 blocks behind. It also goes in an irregular order since the energy differences between the higher principal quantum numbers get smaller and smaller. Therefore, there is a greater variation in electronic configuration with negligible deviations in energy from configurations formed from "normal" building up.
Who is online
Users browsing this forum: No registered users and 1 guest