Nihonium

Nihonium is atom number 113 — every Nihonium atom has exactly 113 protons in its center, and that number is what makes it Nihonium and nothing else. Its symbol is Nh. At room temperature it is a solid.

Nihonium is a chemical element with atomic number 113. It has a symbol Nh. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and is extremely radioactive; its most stable known isotope, nihonium-286, has a half-life of 20 seconds.

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

Nihonium sits in period 7, group 13 of the p-block. Its 113 electrons fill shells of 2, 8, 18, 32, 32, 18, 3 — written as *[Rn] 5f14 6d10 7s2 7p1. Its electronegativity is — on the Pauling scale. The outermost shell holds 3 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 7p1
Electron affinity: 66.6 kJ/mol · Electronegativity (Pauling): —
Density: 16 g/cm³ · melts 700 K · boils 1430 K

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