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Antimony (Sb) – Element 51 of the periodic table

Antimony (symbol Sb) is element number 51 of the periodic table and belongs to the “Metalloid” category. Its atomic mass is about 121.76, and its phase under standard conditions is Solid. This element sits in period 5 and group 15 of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 18, 5. The short electron configuration of Antimony is [Kr] 4d¹⁰ 5s² 5p³. Known uses of Antimony include Batteries, Cable insulation and Ceramics.

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Properties of Antimony

Atomic number
51
Chemical symbol
Sb
Atomic mass
121.76
Category
Metalloid
Period
5
Group
15
Phase
Solid
Protons
51
Electrons
51
Neutrons (approx.)
71
Electron shells
2, 8, 18, 18, 5
Outer-shell electrons
5
Discovered
Prehistoric

Electron configuration of Antimony

The electron configuration of Antimony (Sb), with 51 electrons, is shown below. The last shell (shell 5) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p³
Short configuration
[Kr] 4d¹⁰ 5s² 5p³
Last shell
5s² 5p³

What is electron configuration and how is it written?

Electron shells of Antimony

Distribution of 51 electrons of Antimony across shells K to O:

  1. K2
  2. L8
  3. M18
  4. N18
  5. O5

What is a metalloid?

The metalloids have properties between metals and nonmetals, and many of them are semiconductors.

Uses of Antimony

Frequently asked questions about Antimony

What is the atomic number of Antimony?

The atomic number of Antimony (Sb) is 51; that is, every atom of it has 51 protons.

What is the electron configuration of Antimony?

The electron configuration of Antimony (Sb) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p³; in short form it is [Kr] 4d¹⁰ 5s² 5p³, and its last shell is 5s² 5p³.

What is the chemical symbol of Antimony?

The chemical symbol of Antimony is Sb.

Where is Antimony located in the periodic table?

Antimony is located in period 5 and group 15 and belongs to the “Metalloid” category.

What is the atomic mass of Antimony?

The atomic mass of Antimony is about 121.76 (atomic mass units).

What is the phase of Antimony under normal conditions?

The phase of Antimony under standard conditions is Solid.

What are the uses of Antimony?

Uses of Antimony include Batteries, Cable insulation and Ceramics.

Who discovered Antimony?

Antimony has been known to humans since prehistoric times and has no single discoverer.

Elements in the same category as Antimony (Metalloid)

Boron (B)Silicon (Si)Germanium (Ge)Arsenic (As)Tellurium (Te)

See all Metalloids

Antimony’s group 15 neighbours

Nitrogen (N)Phosphorus (P)Arsenic (As)Bismuth (Bi)Moscovium (Mc)

Group 15 of the periodic table