Copernicium Flerovium

Nihonium (Nh)

From Wikipedia, the free encyclopediaNihonium 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.

Nihonium in the periodic table

Symbol

Atomic number

113

Group

Period

Block

Element category

Unknown

Physical properties

Phase at STP

Solid

Density

16 g/cm³

Atomic weight

286 u

Melting point

700 K
426.85 °C
800.33 °F

Boiling point

1430 K
1156.85 °C
2114.33 °F

Atomic properties

Electronegativity (Pauling Scale)

Electron affinity

66.6 kJ/mol

Oxidation states

(−1), (+1), (+3), (+5)
(predicted)

Ionization energies

1	704.9 kJ/mol
2	2238.5 kJ/mol
3	3023.3 kJ/mol
4	4351.5 kJ/mol
5	5692.6 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)

[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹

Electron configuration

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s² 7p¹

Electrons per shell

2, 8, 18, 32, 32, 18, 3

History

Discovered

2003

Discovered by

RIKEN