Chemical
Chemical Formula
Pm
Sm
Isotopes
Known Isotopes
2730
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.131.17
0
2.6
👆🏻
Sanderson Electronegativity
1.131.17
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.071.07
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
1.131.17
0.62
2.48
👆🏻
Allen Electronegativity
1.131.17
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.202.83
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
540.00 kJ/mol544.50 kJ/mol
375.7
26130
👆🏻
2nd Energy Level
1,050.00 kJ/mol1,070.00 kJ/mol
392.8
28750
👆🏻
3rd Energy Level
2,150.00 kJ/mol2,260.00 kJ/mol
392.8
34230
👆🏻
4th Energy Level
3,970.00 kJ/mol3,990.00 kJ/mol
375.7
37066
👆🏻
5th Energy Level
5,400.00 kJ/mol5,445.00 kJ/mol
392
97510
👆🏻
6th Energy Level
5,400.00 kJ/mol5,445.00 kJ/mol
1007
105800
👆🏻
7th Energy level
5,400.00 kJ/mol5,445.00 kJ/mol
1007
114300
👆🏻
8th Energy Level
5,400.00 kJ/mol5,400.00 kJ/mol
730
125300
👆🏻
9th Energy Level
5,400.00 kJ/mol5,440.00 kJ/mol
1007
134700
👆🏻
10th Energy Level
5,400.00 kJ/mol5,445.00 kJ/mol
392
144300
👆🏻
11th Energy Level
5,400.00 kJ/mol5,445.00 kJ/mol
392
169988
👆🏻
12th Energy Level
5,400.00 kJ/mol5,440.00 kJ/mol
0
189368
👆🏻
13th Energy Level
5,400.00 kJ/mol5,445.00 kJ/mol
1007
76015
👆🏻
14th Energy Level
5,400.00 kJ/mol5,450.00 kJ/mol
380
86450
👆🏻
15th Energy Level
54,000.00 kJ/mol54,450.00 kJ/mol
33000
100700
👆🏻
16th Energy Level
54,000.00 kJ/mol54,400.00 kJ/mol
375.7
109480
👆🏻
17th Energy Level
540.50 kJ/mol544.50 kJ/mol
375.7
122200
👆🏻
18th Energy Level
5,400.00 kJ/mol5,445.00 kJ/mol
0
134810
👆🏻
19th Energy Level
540.00 kJ/mol544.50 kJ/mol
375.7
148700
👆🏻
20th Energy Level
540.00 kJ/mol624.00 kJ/mol
0
171200
👆🏻
21st Energy Level
540.00 kJ/mol544.50 kJ/mol
375.7
179100
👆🏻
22nd Energy Level
540.00 kJ/mol624.00 kJ/mol
330
184900
👆🏻
23rd Energy Level
540.00 kJ/mol544.50 kJ/mol
357.6
198800
👆🏻
24th Energy Level
540.00 kJ/mol544.50 kJ/mol
297.3
195200
👆🏻
25th Energy Level
540.00 kJ/mol544.00 kJ/mol
0
121900
👆🏻
26th Energy Level
540.00 kJ/mol544.50 kJ/mol
357.6
127700
👆🏻
27th Energy Level
540.00 kJ/mol544.50 kJ/mol
0
133800
👆🏻
28th Energy Level
540.00 kJ/mol544.50 kJ/mol
297.3
139800
👆🏻
29th Energy Level
540.00 kJ/mol544.50 kJ/mol
0
148100
👆🏻
30th Energy Level
540.00 kJ/mol544.00 kJ/mol
0
154500
👆🏻
Electrochemical Equivalent
1.80 g/amp-hr1.87 g/amp-hr
0.16812
8.3209
👆🏻
Electron Work Function
5.30 eV2.70 eV
2.14
6
👆🏻
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes