Roentgenium

Chemical, physical and material properties and data of the chemical element Roentgenium.

Contents

General Information about Roentgenium

Regular nameRoentgeniumChemical symbolRgOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Roentgenium

Atomic number Z111 = number of protonsStandard Atomic Weight280.16447 (80)

Electron configuration of Roentgenium

1s	2s	2p	3s	3p	3d	4s	4p	4d	4f	5s	5p	5d	5f	6s	6p	6d	6f	7s	7p
2	2	6	2	6	10	2	6	10	14	2	6	10	14	2	6	10		1

Shorthand electron configuration of Roentgenium: [Rn] 5f¹⁴ 6d¹⁰ 7s¹.

Ionization Energies of Roentgenium

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volt (eV) per atom to separate a given electron from an Roentgenium atom.

IE1	IE2	IE3	IE4	IE5
10.56	21.45	31.91	42.48	54.91

Isotopic Data of Roentgenium

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Roentgenium isotopes.

Chemistry of Roentgenium

Oxidation states+3 (-1. +1. +5)Electron affinity1.565 eV
151.0 kJ mol^-1

Material and Physical Properties

Density22.7 g cm^-3 (20 °C)

External Data, Identifiers

CAS registry number54386-24-2InChI =1S/RgInChIKeyLJROPTGWFUZRDB-UHFFFAOYSA-NPubChem ID135476786

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isotopes

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Last update: 2022-12-12

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