Inner transition metals are a group of elements found in the periodic table that include the lanthanides and actinides. These metals are located in the two rows at the bottom of the table and are characterized by their filling of the f orbital. They are known for their unique properties, such as high melting points and the ability to form various oxidation states. The lanthanides consist of 15 elements from lanthanum to lutetium, while the actinides range from actinium to lawrencium. Many inner transition metals are used in various applications, including electronics, catalysts, and nuclear energy, due to their special chemical and physical properties.