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Uranium (U) – Element 92 of the periodic table

Uranium (symbol U) is element number 92 of the periodic table and belongs to the “Actinide” category. Its atomic mass is about 238.03, and its phase under standard conditions is Solid. This element sits in period 7 and the f-block (Actinides) of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 32, 21, 9, 2. The short electron configuration of Uranium is [Rn] 5f³ 6d¹ 7s². Known uses of Uranium include Nuclear fuel, Nuclear weapons and Glass pigments.

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Properties of Uranium

Atomic number
92
Chemical symbol
U
Atomic mass
238.03
Category
Actinide
Period
7
Block
f
Phase
Solid
Protons
92
Electrons
92
Neutrons (approx.)
146
Electron shells
2, 8, 18, 32, 21, 9, 2
Outer-shell electrons
2
Discovered
Martin Heinrich Klaproth (1789)

Electron configuration of Uranium

The electron configuration of Uranium (U), with 92 electrons, is shown below. The last shell (shell 7) is highlighted:

Full configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f³ 6s² 6p⁶ 6d¹ 7s²
Short configuration
[Rn] 5f³ 6d¹ 7s²
Last shell
7s²

What is electron configuration and how is it written?

Electron shells of Uranium

Distribution of 92 electrons of Uranium across shells K to Q:

  1. K2
  2. L8
  3. M18
  4. N32
  5. O21
  6. P9
  7. Q2

What is a actinide?

The actinides are the 15 elements from actinium to lawrencium, part of the f-block, and all of them are radioactive.

Uses of Uranium

Frequently asked questions about Uranium

What is the atomic number of Uranium?

The atomic number of Uranium (U) is 92; that is, every atom of it has 92 protons.

What is the electron configuration of Uranium?

The electron configuration of Uranium (U) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f³ 6s² 6p⁶ 6d¹ 7s²; in short form it is [Rn] 5f³ 6d¹ 7s², and its last shell is 7s².

What is the chemical symbol of Uranium?

The chemical symbol of Uranium is U.

Where is Uranium located in the periodic table?

Uranium is located in period 7 and the f-block (Actinides) and belongs to the “Actinide” category.

What is the atomic mass of Uranium?

The atomic mass of Uranium is about 238.03 (atomic mass units).

What is the phase of Uranium under normal conditions?

The phase of Uranium under standard conditions is Solid.

What are the uses of Uranium?

Uses of Uranium include Nuclear fuel, Nuclear weapons and Glass pigments.

Who discovered Uranium?

Uranium was discovered by Martin Heinrich Klaproth in 1789.

Elements in the same category as Uranium (Actinide)

Actinium (Ac)Thorium (Th)Protactinium (Pa)Neptunium (Np)Plutonium (Pu)Americium (Am)Curium (Cm)Berkelium (Bk)Californium (Cf)Einsteinium (Es)Fermium (Fm)Mendelevium (Md)Nobelium (No)Lawrencium (Lr)

See all Actinides