Nobelium

Nobelium is atom number 102 — every Nobelium atom has exactly 102 protons in its center, and that number is what makes it Nobelium and nothing else. Its symbol is No. At room temperature it is a solid.

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. A radioactive metal, it is the tenth transuranic element and is the penultimate member of the actinide series.

Summary from the source dataset, derived from Wikipedia (CC BY-SA 3.0) · original article

Nobelium sits in period 7, group 3 of the f-block. Its 102 electrons fill shells of 2, 8, 18, 32, 32, 8, 2 — written as [Rn] 5f14 7s2. Its electronegativity is 1.3 on the Pauling scale, and pulling the first electron off takes 642 kJ/mol. The outermost shell holds 2 electrons — the ones that do all the chemistry.

Full configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14
Ionization energies (kJ/mol): 642
Electron affinity: -223.22 kJ/mol · Electronegativity (Pauling): 1.3
Density: — · melts 1100 K · boils —

Values exactly as published — see where the data comes from.