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What are the metallic f-block elements with atomic numbers 58-71 of the Periodic Table of Elements called?

A. Nonmetals
B. Lanthanides
C. Metalloids
D. Transition metals
E. Actinides

Answer :

Final answer:

The metallic f-block elements with atomic numbers 58-71 on the Periodic Table are called lanthanides. They are part of the inner transition series and the last electron added in their atomic structure occupies an f-orbital.

Explanation:

The metallic f-block elements with atomic numbers 58-71 of the Periodic Table of Elements are called lanthanides. These elements from Ce (Cerium) through Lu (Lutetium) constitute an important part of the periodic table known as the lanthanides. They are considered as part of the inner transition series of elements. In these elements, the final electron added to their atomic structure occupies an f-orbital, leading to their classification as f-block elements.

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The metallic f-block elements with atomic numbers 58-71 are called lanthanides. Therefore, the correct answer is option b. lanthanides.

These elements are often referred to as the lanthanoid series and include elements such as cerium (Ce), neodymium (Nd), and europium (Eu).

The f-block elements are also known as inner transition metals. Lanthanides are known for their unique properties and are commonly used in advanced technologies such as magnets, phosphors, and catalysts.