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Holmium (Ho) – Element 67 of the periodic table

Holmium (symbol Ho) is element number 67 of the periodic table and belongs to the “Lanthanide” category. Its atomic mass is about 164.93, 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, 29, 8, 2. The short electron configuration of Holmium is [Xe] 4f¹¹ 6s². Known uses of Holmium include Magnets, Medical lasers and Equipment calibration.

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Properties of Holmium

Atomic number
67
Chemical symbol
Ho
Atomic mass
164.93
Category
Lanthanide
Period
6
Block
f
Phase
Solid
Protons
67
Electrons
67
Neutrons (approx.)
98
Electron shells
2, 8, 18, 29, 8, 2
Outer-shell electrons
2
Discovered
Paul-Émile Lecoq de Boisbaudran (1878)

Electron configuration of Holmium

The electron configuration of Holmium (Ho), with 67 electrons, is shown below. The last shell (shell 6) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹¹ 5s² 5p⁶ 6s²
Short configuration
[Xe] 4f¹¹ 6s²
Last shell
6s²

What is electron configuration and how is it written?

Electron shells of Holmium

Distribution of 67 electrons of Holmium across shells K to P:

  1. K2
  2. L8
  3. M18
  4. N29
  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 Holmium

Frequently asked questions about Holmium

What is the atomic number of Holmium?

The atomic number of Holmium (Ho) is 67; that is, every atom of it has 67 protons.

What is the electron configuration of Holmium?

The electron configuration of Holmium (Ho) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹¹ 5s² 5p⁶ 6s²; in short form it is [Xe] 4f¹¹ 6s², and its last shell is 6s².

What is the chemical symbol of Holmium?

The chemical symbol of Holmium is Ho.

Where is Holmium located in the periodic table?

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

What is the atomic mass of Holmium?

The atomic mass of Holmium is about 164.93 (atomic mass units).

What is the phase of Holmium under normal conditions?

The phase of Holmium under standard conditions is Solid.

What are the uses of Holmium?

Uses of Holmium include Magnets, Medical lasers and Equipment calibration.

Who discovered Holmium?

Holmium was discovered by Paul-Émile Lecoq de Boisbaudran in 1878.

Elements in the same category as Holmium (Lanthanide)

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

See all Lanthanides