Moscovium

Moscovium is atom number 115 — every Moscovium atom has exactly 115 protons in its center, and that number is what makes it Moscovium and nothing else. Its symbol is Mc. At room temperature it is a solid.

Moscovium is the name of a synthetic superheavy element in the periodic table that has the symbol Mc and has the atomic number 115. It is an extremely radioactive element; its most stable known isotope, moscovium-289, has a half-life of only 220 milliseconds. It is also known as eka-bismuth or simply element 115.

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

Moscovium sits in period 7, group 15 of the p-block. Its 115 electrons fill shells of 2, 8, 18, 32, 32, 18, 5 — written as *[Rn] 5f14 6d10 7s2 7p3. Its electronegativity is — on the Pauling scale. The outermost shell holds 5 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 6d10 7p3
Electron affinity: 35.3 kJ/mol · Electronegativity (Pauling): —
Density: 13.5 g/cm³ · melts 670 K · boils 1400 K

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