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Compare Gold vs Rhenium

Comparing Gold (Au) and Rhenium (Re). Atomic numbers 79 and 75 with atomic masses 196.967 u and 186.207 u, classified as transition metal and transition metal. Below: a side-by-side comparison of their physical, atomic, electron-configuration and historical properties, including density, melting and boiling points, ionization energies, oxidation states and discovery history.

vs
Au
Gold
#79
Re
Rhenium
#75

Periodic properties of the elements

GoldRhenium
SymbolAuRe
Atomic number7975
Group117
Period66
Blockdd
Element categoryTransition MetalTransition Metal

Physical properties

GoldRhenium
Phase at STPSolidSolid
Density19.3 g/cm321.02 g/cm3
Atomic weight196.967 u186.207 u
Melting point1337.33 K
1064.18 °C
1947.524 °F		3459 K
3185.85 °C
5766.53 °F
Boiling point3243 K
2969.85 °C
5377.73 °F		5869 K
5595.85 °C
10104.53 °F

Atomic properties

GoldRhenium
Electronegativity (Pauling Scale)2.541.9
Electron affinity222.747 kJ/mol5.8273 kJ/mol
Oxidation states−3, −2, −1, 0, +1, +2, +3, +5
(an amphoteric oxide)		−3, −1, 0, +1, +2, +3, +4, +5, +6, +7
(a mildly acidic oxide)
Ionization energies
  1. 890.1 kJ/mol
  2. 1980 kJ/mol
  1. 760 kJ/mol
  2. 1260 kJ/mol
  3. 2510 kJ/mol
  4. 3640 kJ/mol

Electron configuration

GoldRhenium
Shorthand configuration[Xe] 4f14 5d10 6s1 [Xe] 4f14 5d5 6s2
Full configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s1 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d5 6s2
Electrons per shell2, 8, 18, 32, 18, 12, 8, 18, 32, 13, 2

History

GoldRhenium
DiscoveryLevant (6000 BC)Walter Noddack, Ida Noddack, Otto Berg (1925)
First isolationWalter Noddack, Ida Noddack (1928)
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