Question

What is called lanthanides and actinides ​

Answer 1

Answer:

The lanthanides and actinides are groups of elements in the periodic table.

They are often called the inner transition metal

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Answer 2

Answer:

Lanthanoids include 14 elements, with atomic numbers 58-71:

Cerium: Xe 4f1 5d1 6s2

Praseodymium: Xe 4f3 6s2

Neodymium: Xe 4f4 6s2

Promethium: Xe 4f5 6s2

Samarium: Xe 4f6 6s2

Europium: Xe 4f7 6s2

Gadolinium: Xe 4f7 5d1 6s2

Terbium: Xe 4f9 6s2

Dysprosium: Xe 4f10 6s2

Holmium: Xe 4f11 6s2

Erbium: Xe 4f12 6s2

Thulium: Xe 4f13 6s2

Ytterbium: Xe 4f14 6s2

Lutetium: Xe 4f14 5d1 6s2

Explanation:

*actanoids*

Thorium: Rn 6d2 7s2

Protactinium: Rn 5f2 6d1 7s2

Uranium: Rn 5f3 6d1 7s2

Neptunium: Rn 5f4 6d1 7s2

Plutonium: Rn 5f6 7s2

Americium: Rn 5f7 7s2

Curium: Rn 5f7 6d1 7s2

Berkelium: Rn 5f9 7s2

Californium: Rn 5f10 7s2

Einsteinium: Rn 5f11 7s2

Fermium: Rn 5f12 7s2

Mendelevium: Rn 5f13 7s2

Nobelium: Rn 5f14 7s2

Lawrencium: Rn 5f14 7s2 7p1

Several of these elements are not found naturally on the earth, but have only been created synthetically in a laboratory. Since all of these elements have an atomic number above 83, they are all considered radioactively unstable.