Pm	Z =  61	◊ ◊ ◊ ◊ ◊	Promethium
			From the Greek "Prometheus", meaning "forethought"
(AM) Atomic Mass	145  amu	♦	Oxidation States	+3
(BP) Boiling Point	2460  °C	♦	(MP) Melting Point	1080  °C
(ρ) Density	7.22  g/cm3	♦	Crystal Structure	Hexagonal
( χ ) Electronegativity	n/a	♦	(AR) Atomic Radius	1.63  Å
Physical State	Artificial	♦	(C) Heat Capacity	n/a
Electronic-Config	[Xe]  4f5  6s2	♦	(I1) First Ionization E	535.88  kJ/mol
(ΔHvap) Heat of Vaporization	289  kJ/mol	♦	(ΔHfus) Heat of Fusion	7.13  kJ/mol
Year of Discovery	1945	♦	Location of Discovery	United States
(E°) Standard Potential	Pm2+⇔ Pm (-2.200 V)
Stable isotopes	None. All natural isotopes are radioactive
Discovered/Synthesized by	Jacob A. Marinsky, Lawrence E. Glendenin, Charles D. Coryell
Natural Source	Promethiumman-made, synthetic
Common Uses	Luminous dials, sheet thickness gauges
Other Info	Has no stable isotopes
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