Samarium

Samarium is atom number 62 — every Samarium atom has exactly 62 protons in its center, and that number is what makes it Samarium and nothing else. Its symbol is Sm. At room temperature it is a solid.

Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that readily oxidizes in air. Being a typical member of the lanthanide series, samarium usually assumes the oxidation state +3.

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

Samarium sits in period 6, group 3 of the f-block. Its 62 electrons fill shells of 2, 8, 18, 24, 8, 2 — written as [Xe] 4f6 6s2. Its electronegativity is 1.17 on the Pauling scale, and pulling the first electron off takes 544.5 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 4f6
Ionization energies (kJ/mol): 544.5, 1070, 2260, 3990
Electron affinity: 15.63 kJ/mol · Electronegativity (Pauling): 1.17
Density: 7.52 g/cm³ · melts 1345 K · boils 2173 K

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