Just so it can fit on one page
Lanthanides and Actinides.
The 2 bottom rows separated from the rest
Lanthanides & Actinides
Lanthanides and actinides (or f-block elements).
Lanthanides and actinides!
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 and the Actinides have been moved in the periodic table simply to save space. --PainRain
At the bottom of the Periodic Table
Two rows of elements called the "LANTHANIDES" and the "ACTINIDES".
Rare Earth elements or lanthanides are placed in the period 6 of the periodic table of Mendeleev. Actinoids are placed in the period 7 of the periodic table of Mendeleev.
The periodic table of elements is a chart that organizes the elements and emphasizes their shared traits and commonalities. All the known elements and their atomic number are on the periodic table.