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Dysprosium (Dy) – Element 66 of the periodic table

Dysprosium (symbol Dy) is element number 66 of the periodic table and belongs to the “Lanthanide” category. Its atomic mass is about 162.5, 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, 28, 8, 2. The short electron configuration of Dysprosium is [Xe] 4f¹⁰ 6s². Known uses of Dysprosium include Strong magnets, Lasers and Reactor control.

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Properties of Dysprosium

Atomic number
66
Chemical symbol
Dy
Atomic mass
162.5
Category
Lanthanide
Period
6
Block
f
Phase
Solid
Protons
66
Electrons
66
Neutrons (approx.)
97
Electron shells
2, 8, 18, 28, 8, 2
Outer-shell electrons
2
Discovered
Paul-Émile Lecoq de Boisbaudran (1886)

Electron configuration of Dysprosium

The electron configuration of Dysprosium (Dy), with 66 electrons, is shown below. The last shell (shell 6) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁰ 5s² 5p⁶ 6s²
Short configuration
[Xe] 4f¹⁰ 6s²
Last shell
6s²

What is electron configuration and how is it written?

Electron shells of Dysprosium

Distribution of 66 electrons of Dysprosium across shells K to P:

  1. K2
  2. L8
  3. M18
  4. N28
  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 Dysprosium

Frequently asked questions about Dysprosium

What is the atomic number of Dysprosium?

The atomic number of Dysprosium (Dy) is 66; that is, every atom of it has 66 protons.

What is the electron configuration of Dysprosium?

The electron configuration of Dysprosium (Dy) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁰ 5s² 5p⁶ 6s²; in short form it is [Xe] 4f¹⁰ 6s², and its last shell is 6s².

What is the chemical symbol of Dysprosium?

The chemical symbol of Dysprosium is Dy.

Where is Dysprosium located in the periodic table?

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

What is the atomic mass of Dysprosium?

The atomic mass of Dysprosium is about 162.5 (atomic mass units).

What is the phase of Dysprosium under normal conditions?

The phase of Dysprosium under standard conditions is Solid.

What are the uses of Dysprosium?

Uses of Dysprosium include Strong magnets, Lasers and Reactor control.

Who discovered Dysprosium?

Dysprosium was discovered by Paul-Émile Lecoq de Boisbaudran in 1886.

Elements in the same category as Dysprosium (Lanthanide)

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

See all Lanthanides