Chemical Element #61: Promethium (Pm)

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Atomic Number: 61, Element Symbol: Pm, Element Name: Promethium, Atomic Mass: 144.91276 u.

Detailed Properties:

Atomic Number:	61
Element Symbol:	Pm
Element Name:	Promethium
Electron Configuration:	[Xe]6s²4f⁵
Atomic Mass:	144.912760 u
Melting Point:	1315.00 K
Boiling Point:	3273.00 K

Stable Isotopes:

Isotope	Mass	Abundance
¹⁴⁵Pm	144.912756	Unknown
¹⁴⁷Pm	146.915145	Unknown

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2023-09-05, 327👍, 0💬

Chemical Element #56: Barium (Ba)
Atomic Number: 56, Element Symbol: Ba, Element Name: Barium, Atomic Mass: 137.33 u. 2023-09-05, 473🔥, 0💬

Chemical Element #60: Neodymium (Nd)
Atomic Number: 60, Element Symbol: Nd, Element Name: Neodymium, Atomic Mass: 144.24 u. 2023-09-05, 448🔥, 0💬

Chemical Element #62: Samarium (Sm)
Atomic Number: 62, Element Symbol: Sm, Element Name: Samarium, Atomic Mass: 150.4 u. 2023-09-05, 446🔥, 0💬

Chemical Element #63: Europium (Eu)
Atomic Number: 63, Element Symbol: Eu, Element Name: Europium, Atomic Mass: 151.96 u. 2022-12-03, 412🔥, 0💬

Chemical Element #57: Lanthanum (La)
Atomic Number: 57, Element Symbol: La, Element Name: Lanthanum, Atomic Mass: 138.9055 u. 2023-09-05, 404🔥, 0💬

Chemical Element #59: Praseodymium (Pr)
Atomic Number: 59, Element Symbol: Pr, Element Name: Praseodymium, Atomic Mass: 140.9077 u. 2023-09-05, 386🔥, 0💬

Chemical Element #64: Gadolinium (Gd)
Atomic Number: 64, Element Symbol: Gd, Element Name: Gadolinium, Atomic Mass: 157.2 u. 2022-12-02, 346🔥, 0💬

Chemical Element #66: Dysprosium (Dy)
Atomic Number: 66, Element Symbol: Dy, Element Name: Dysprosium, Atomic Mass: 162.50 u. 2022-11-21, 336🔥, 0💬

Chemical Element #65: Terbium (Tb)
Atomic Number: 65, Element Symbol: Tb, Element Name: Terbium, Atomic Mass: 158.92535 u. 2022-11-21, 334🔥, 0💬

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