Question

What is Lanthanide and Actinide series?​

Answer 1

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Answer 2

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⭐ What is Lanthanide and Actinide series?

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⚽Elements whose f orbital getting filled up by electrons are called f block elements. These elements have electrons, (1 to 14) in the f orbital, (0 to 1) in the d orbital of the penultimate energy level and in the outermost’s orbital.

⚽There are two series in the f block corresponding to the filling up of 4f and 5f orbitals. The elements are 4f series of Ce to Lu and 5f series of Th to Lw. There are 14 elements filling up the ‘f’ orbital in each series.

F Block Elements

✨The position of F Block Elements in the Periodic Table: F block elements are placed separately at the bottom of the periodic table. They are a subset of 6th and 7th periods.

⚽ Following are the significant similarities:

• Both have a prominent oxidation state of +3.

• They are involved in the filling of (n-2) f orbitals.

• They are highly electropositive and very reactive in nature.

• With an increase in atomic number, there is a decrease in atomic and ionic size.

• Both show magnetic properties.