Transition elements Inner transition elements

Transition elements	Inner transition elements
i. In the atoms of these elements the last two shells are incompletely filled. ii. These elements are placed in groups 3 to 12 in middle of the modern periodic table. iii. They are included in d – block of the modern periodic table.	i. In the atoms of these elements the last three shells are incompletely filled. ii. These elements are placed in two additional rows (i.e. lanthanides and actinides) called series, placed at the bottom of the modern periodic table. iii. They are included in f -  block of modern periodic table.