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, 882👍, 0💬

Chemical Element #58: Cerium (Ce)
Atomic Number: 58, Element Symbol: Ce, Element Name: Cerium, Atomic Mass: 140.12 u. 2023-09-05, 1280🔥, 0💬

Chemical Element #59: Praseodymium (Pr)
Atomic Number: 59, Element Symbol: Pr, Element Name: Praseodymium, Atomic Mass: 140.9077 u. 2023-09-05, 1154🔥, 0💬

Chemical Element #62: Samarium (Sm)
Atomic Number: 62, Element Symbol: Sm, Element Name: Samarium, Atomic Mass: 150.4 u. 2023-09-05, 1132🔥, 0💬

Chemical Element #57: Lanthanum (La)
Atomic Number: 57, Element Symbol: La, Element Name: Lanthanum, Atomic Mass: 138.9055 u. 2023-09-05, 1067🔥, 0💬

Chemical Element #60: Neodymium (Nd)
Atomic Number: 60, Element Symbol: Nd, Element Name: Neodymium, Atomic Mass: 144.24 u. 2023-09-05, 1043🔥, 0💬

Chemical Element #61: Promethium (Pm)
Atomic Number: 61, Element Symbol: Pm, Element Name: Promethium, Atomic Mass: 144.91276 u. 2023-09-05, 883🔥, 0💬

Chemical Element #63: Europium (Eu)
Atomic Number: 63, Element Symbol: Eu, Element Name: Europium, Atomic Mass: 151.96 u. 2022-12-03, 784🔥, 0💬

Chemical Element #65: Terbium (Tb)
Atomic Number: 65, Element Symbol: Tb, Element Name: Terbium, Atomic Mass: 158.92535 u. 2022-11-21, 655🔥, 0💬

Chemical Element #66: Dysprosium (Dy)
Atomic Number: 66, Element Symbol: Dy, Element Name: Dysprosium, Atomic Mass: 162.50 u. 2022-11-21, 648🔥, 0💬

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