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Samarium (Sm) – Element 62 of the periodic table

Samarium (symbol Sm) is element number 62 of the periodic table and belongs to the “Lanthanide” category. Its atomic mass is about 150.36, and its phase under standard conditions is Solid. This element sits in period 6 and the f-block (Lanthanides) of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 24, 8, 2. The short electron configuration of Samarium is [Xe] 4f⁶ 6s². Known uses of Samarium include Magnets, Cancer treatment and Reactor control.

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Properties of Samarium

Atomic number
62
Chemical symbol
Sm
Atomic mass
150.36
Category
Lanthanide
Period
6
Block
f
Phase
Solid
Protons
62
Electrons
62
Neutrons (approx.)
88
Electron shells
2, 8, 18, 24, 8, 2
Outer-shell electrons
2
Discovered
Paul-Émile Lecoq de Boisbaudran (1879)

Electron configuration of Samarium

The electron configuration of Samarium (Sm), with 62 electrons, is shown below. The last shell (shell 6) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁶ 5s² 5p⁶ 6s²
Short configuration
[Xe] 4f⁶ 6s²
Last shell
6s²

What is electron configuration and how is it written?

Electron shells of Samarium

Distribution of 62 electrons of Samarium across shells K to P:

  1. K2
  2. L8
  3. M18
  4. N24
  5. O8
  6. P2

What is a lanthanide?

The lanthanides are the 15 elements from lanthanum to lutetium, part of the f-block, with very similar chemical properties; they are often grouped among the “rare earths”.

Uses of Samarium

Frequently asked questions about Samarium

What is the atomic number of Samarium?

The atomic number of Samarium (Sm) is 62; that is, every atom of it has 62 protons.

What is the electron configuration of Samarium?

The electron configuration of Samarium (Sm) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁶ 5s² 5p⁶ 6s²; in short form it is [Xe] 4f⁶ 6s², and its last shell is 6s².

What is the chemical symbol of Samarium?

The chemical symbol of Samarium is Sm.

Where is Samarium located in the periodic table?

Samarium is located in period 6 and the f-block (Lanthanides) and belongs to the “Lanthanide” category.

What is the atomic mass of Samarium?

The atomic mass of Samarium is about 150.36 (atomic mass units).

What is the phase of Samarium under normal conditions?

The phase of Samarium under standard conditions is Solid.

What are the uses of Samarium?

Uses of Samarium include Magnets, Cancer treatment and Reactor control.

Who discovered Samarium?

Samarium was discovered by Paul-Émile Lecoq de Boisbaudran in 1879.

Elements in the same category as Samarium (Lanthanide)

Lanthanum (La)Cerium (Ce)Praseodymium (Pr)Neodymium (Nd)Promethium (Pm)Europium (Eu)Gadolinium (Gd)Terbium (Tb)Dysprosium (Dy)Holmium (Ho)Erbium (Er)Thulium (Tm)Ytterbium (Yb)Lutetium (Lu)

See all Lanthanides