Question

what are inner transition elements? Why are they so called? How many series of inner transition elements are present in the modern periodic table? Write their names and atomic number.

Answer 1

They are normally shown in two rows below all the other elements. They include elements 57-71 (lanthanides) and 89-103 (actinides). The lanthanides are very similar, and the actinides are all radioactive. ITMs have three incomplete outermost electron shells and are all metals