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Lanthanide is a term for 14 metallic elements with atomic numbers 57–70, filling the 4f orbitals in the periodic table. They have similar chemistry and form trivalent cations, Ln 3+, with decreasing ionic radius.
The lanthanides or lanthanoid series is a group of transition metals located on the periodic table in the first row (period) below the main body of the table. The lanthanides are commonly referred to as the rare earth elements (REE), although many people group scandium and yttrium together under this label as well.
The Lanthanides consist of the elements in the f-block of period six in the periodic table. While these metals can be considered transition metals, they have properties that set them apart from the rest of the elements.
The lanthanides are located on the top row of the two rows of elements found below the main body of the periodic table. Placing the lanthanides and the actinides (the row below the lanthanides) below the other elements is just a matter of aesthetics.
Lanthanide is a term for 15 consecutive chemical elements in the periodic table from lanthanum to lutetium, also known as rare-earth metals. Learn about their properties, history, applications, and sources from Britannica's experts.
Lanthanides are a group of 15 chemical elements in block 5 d of the periodic table, with one valence electron in the 5d shell. They are reactive, silver-colored metals that have many scientific and industrial uses, such as catalysts, magnets, lasers, and phosphors.
Lanthanides and actinides are elements with unfilled \(f\) orbitals. Lanthanides are all metals with reactivity similar to group 2 elements. Actinides are all radioactive elements. Lanthanides are used in optical devices (night vision goggles), petroleum refining, and alloys.
The lanthanide series consists of the 14 elements, with atomic numbers 58 through 71, that follow lanthanum on the periodic table of elements. These 14, along with the actinides — atomic numbers 90 through 103 — are set aside from the periodic table due to similarities in properties that define each group.
Where are the lanthanides located in the periodic table? The lanthanides are located in group 3 of the 6 th period of the periodic table in between barium (Ba) and hafnium (Hf). They are shown below the body of the periodic table for simplicity.
The Lanthanides consist of the elements in the f-block of period six in the periodic table. While these metals can be considered transition metals, they have properties that set them apart from the rest of the elements.