Because they're rare earth elements.
Actinides and lanthanides lose electrons and form cations.
At the bottom of the Periodic Table
The lanthanides get their name from the element lanthanum, which was the first in the series to be discovered. The actinides get their name from actinium, which was the first element in this series to be discovered.
The densities of the lanthanides generally have less variability compared to the densities of the actinides. This is because the lanthanides are more similar in size and electronic structure, leading to more consistent densities. In contrast, the actinides exhibit larger variations in density due to differences in atomic structure and electron configurations.
Group 12 elements on the periodic table are not lanthanides or actinides. They are transition metals, also known as the zinc group, which includes elements like zinc (Zn), cadmium (Cd), and mercury (Hg). Lanthanides and actinides are separate groups that are located in the inner transition metals section of the periodic table.
Lanthanides and Actinides.
Lanthanides & Actinides
Just so it can fit on one page
The 2 bottom rows separated from the rest
Lanthanides and actinides (or f-block elements).
Wht is the difference between Lanthanides and Actinides?
Actinides and lanthanides lose electrons and form cations.
At the bottom of the Periodic Table
The first period is at the top of the table. It consists of hydrogen and helium. The bottom period is period 7.
Lanthanides and actinides!
The lanthanides get their name from the element lanthanum, which was the first in the series to be discovered. The actinides get their name from actinium, which was the first element in this series to be discovered.
Lanthanides and actinides!