Atomic Number
102
Element 102
Nobelium (No)
Nobelium is a synthetic chemical element with symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science.
Atomic Mass
259 u
Category
Actinide
Period
7
Group
Actinide series
Phase
solid
Density
9.9 g/cm3
Electron Shells
2, 8, 18, 32, 32, 8, 2
Atomic Structure
Protons: 102. Electrons: 102. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴
Why Nobelium Matters
Nobelium helps connect atomic number 102, actinide behavior, period 7 trends, and electron shell structure. Its solid phase, atomic mass of 259 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Nobelium was discovered 1966 by Georgy Flerov, Yuri Oganessian. Nobelium is a synthetic chemical element with symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inventor of dynamite and benefactor of science.
Safety and Handling Context
Nobelium 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 Nobelium?
- Nobelium has atomic number 102, which means a neutral atom has 102 protons and 102 electrons.
- What is the chemical symbol for Nobelium?
- The chemical symbol for Nobelium is No.
- What category is Nobelium in?
- Nobelium is classified as a actinide and sits in period 7 of the periodic table.
Explore Nobelium in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Nobelium to neighboring elements without losing your place.