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 Number

102

Atomic Mass

259 u

Category

actinide

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

Discovery

1966 • Georgy Flerov, Yuri Oganessian