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Compare Mercury vs Rhenium

Comparing Mercury (Hg) and Rhenium (Re). Atomic numbers 80 and 75 with atomic masses 200.592 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
Hg
Mercury
#80
Re
Rhenium
#75

Periodic properties of the elements

MercuryRhenium
SymbolHgRe
Atomic number8075
Group127
Period66
Blockdd
Element categoryTransition MetalTransition Metal

Physical properties

MercuryRhenium
Phase at STPLiquidSolid
Density13.534 g/cm321.02 g/cm3
Atomic weight200.592 u186.207 u
Melting point234.321 K
-38.829 °C
-37.8922 °F		3459 K
3185.85 °C
5766.53 °F
Boiling point629.88 K
356.73 °C
674.114 °F		5869 K
5595.85 °C
10104.53 °F

Atomic properties

MercuryRhenium
Electronegativity (Pauling Scale)21.9
Electron affinity-48 kJ/mol5.8273 kJ/mol
Oxidation states−2 , +1, +2
(a mildly basic oxide)		−3, −1, 0, +1, +2, +3, +4, +5, +6, +7
(a mildly acidic oxide)
Ionization energies
  1. 1007.1 kJ/mol
  2. 1810 kJ/mol
  3. 3300 kJ/mol
  1. 760 kJ/mol
  2. 1260 kJ/mol
  3. 2510 kJ/mol
  4. 3640 kJ/mol

Electron configuration

MercuryRhenium
Shorthand configuration[Xe] 4f14 5d10 6s2 [Xe] 4f14 5d5 6s2
Full configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d5 6s2
Electrons per shell2, 8, 18, 32, 18, 22, 8, 18, 32, 13, 2

History

MercuryRhenium
DiscoveryEgyptians (1500 BC)Walter Noddack, Ida Noddack, Otto Berg (1925)
First isolationWalter Noddack, Ida Noddack (1928)
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