Atomic Number
92
Element 92
Uranium (U)
Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-white metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.
Atomic Mass
238.03 u
Category
Actinide
Period
7
Group
Actinide series
Phase
solid
Density
19.1 g/cm3
Electron Shells
2, 8, 18, 32, 21, 9, 2
Atomic Structure
Protons: 92. Electrons: 92. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f³ 6d¹
Why Uranium Matters
Uranium helps connect atomic number 92, actinide behavior, period 7 trends, and electron shell structure. Its solid phase, atomic mass of 238.03 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f³ 6d¹ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Uranium was discovered 1789 by Martin Heinrich Klaproth. Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-white metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.
Safety and Handling Context
Uranium has radioactive isotopes or is commonly discussed with radioactive materials. Use this page as an educational reference; real samples require qualified supervision and controlled handling.
Related Elements
Frequently Asked Questions
- What is the atomic number of Uranium?
- Uranium has atomic number 92, which means a neutral atom has 92 protons and 92 electrons.
- What is the chemical symbol for Uranium?
- The chemical symbol for Uranium is U.
- What category is Uranium in?
- Uranium is classified as a actinide and sits in period 7 of the periodic table.
Explore Uranium in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Uranium to neighboring elements without losing your place.