What elements are outer transition elements in periodic table?

Answer 1

An element with an incomplete d subshell. Elements which have common cations with incomplete d subshells are also considered transition metals. Elements with incomplete f subshells are sometimes called "inner transition elements."

Answer 2

The Lanthanoids and Actinoids are placed outside the transition Group to differentiate their property of valence electron entering f orbital which subsequently affects their chemical and physical properties as well.

Answer 3

The outer transition elements in the Periodic Table are located in the f-block and include the lanthanides (elements 57-71) and actinides (elements 89-103). They are sometimes referred to as the inner transition elements, as they have valence electrons in the f-orbitals.