This is a SUPER easy guide on the Holmium element.
In fact, the table mentioned below is the perfect information box (Which gives you every single detail about the Holmium element in Periodic table.)
So if you want to know anything about Holmium element, then this guide is for you.
Let’s dive right into it!
Holmium Element (Ho) Information
|Appearance of Holmium|| |
Silvery white metallic
|State of Holmium at STP||Solid|
|Position of Holmium in Periodic table|
Group: lanthanides, Period: 6, Block: f
|Category of Holmium element|
Inner transition metals
|Atomic number of Holmium, or |
Protons in Holmium
|Neutrons in Holmium||98|
|Electrons in Holmium||67|
|Symbol of Holmium||Ho|
|Atomic mass of Holmium|| |
|Electrons arrangement in Holmium|
Bohr model of Holmium
2, 8, 18, 29, 8, 2
|Electronic configuration of Holmium||[Xe] 4f11 6s2|
|Atomic radius of Holmium|
216 picometers (van der Waals radius)
|1st Ionization energy of Holmium||6.022 eV|
|Electronegativity of Holmium|| |
1.23 (Pauling scale)
|Crystal structure of Holmium|
HCP (Hexagonal close packed)
|Melting point of Holmium||1734 K or 1461 °C or 2662 °F|
|Boiling point of Holmium||2873 K or 2600 °C or 4712 °F|
|Density of Holmium||8.8 g/cm3|
|Main isotope of Holmium||165Ho|
|Who discovered Holmium and when?|
Marc Delafontaine and Jacques Louis Soret (in 1878)
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Holmium in Periodic table
Holmium element is in period 6 and in lanthanide group of the Periodic table. Holmium is the f-block element and it belongs to inner transition metals group.
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Why is Holmium in Period 6?
Let me ask you a question.
How many shells does holmium have?
It’s 6. Right?
You have already seen the bohr model of holmium atom in the above table.
From the Bohr model, it can be found that the number of orbits or shells in holmium is 6. Hence, as holmium has 6 orbits, it lies in period 6 of the Periodic table.
Why is Holmium in f-block?
Before knowing this reason, first of all I want to ask you a simple question.
How can you determine the blocks-wise position of elements?
The simple answer: The elements will lie in the s, p, d or f block will completely depend upon the subshell in which the last electron will enter.
For example; the electron configuration of holmium is [Xe] 6s2 4f11.
So the last electron of holmium enters the f-subshell or f-orbital.
Hence, holmium is the f-block element.
5 Interesting facts about Holmium
Interesting facts about holmium element are mentioned below.
- The name Holmium was derived from the Greek word “Holmia” which means stockholm.
- Holmium was discovered by two chemists Marc Delafontaine and Jacques Louis Soret (in 1878).
- The abundance of holmium in the earth’s crust is approximately 1.2 ppm by weight.
- Holmium is the 56th most abundant element in the earth’s crust.
- Holmium is mostly obtained from regions like China, USA, India, Sri Lanka, Brazil and Australia. These regions have estimated reserves of 400,000 tons of holmium in total.
Properties of Holmium
The physical and chemical properties of holmium element are mentioned below.
Physical properties of Holmium
Physical properties of holmium are mentioned below.
- Holmium is a soft and malleable metal having a Silvery white metallic appearance.
- The melting point of holmium is 1461 °C and its boiling point is 2600 °C.
- The atomic mass of holmium is 164.93 u and its density is 8.8 g/cm3.
- There are many isotopes of holmium, but out of those isotopes, the most abundant isotope is 165Ho (which has an abundance of almost 100%). Rest of the isotopes are synthetically made by humans in the laboratory.
- The crystal structure of holmium is HCP (Hexagonal close packed).
Chemical properties of Holmium
Chemical properties of holmium are mentioned below.
- Holmium is a reactive metal and hence it is not found in a free state in nature. But it is always found as a compound in the earth’s crust.
- When holmium is kept open in dry air, it does not tarnish. But if the air is moist, then it tarnishes and forms holmium oxide.
- The most common oxidation state of holmium is +3. And it exists as in Ho3+ state in its compounds.
Uses of Holmium
Uses of holmium are mentioned below.
- Holmium has magnetic properties and hence it is used as an alloying element in manufacturing of magnets. 
- Holmium oxides are yellow in color and hence it is used in manufacturing of yellow colored glass.
- Holmium is also used in making solid state lasers as well as it is also used in medical applications to treat cancer as well as kidney stones.
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3). You will also get the HD images of the Periodic table (for FREE).
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Chemical data: Wikipedia, Chemspider
Holmium element: Image credits- Images of elements
Marc Delafontaine: Image by Chicago Tribune (30 de maig del 1897), Public domain, via Wikimedia Commons
Jacques Louis Soret: Image by The British Library (Original) Wolfymoza (Commons upload), No restrictions, via Wikimedia Commons