Chemical
Chemical Formula
Ca
Th
Isotopes
Known Isotopes
1928
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.001.30
0.7
2.54
👆🏻
Sanderson Electronegativity
0.95NA
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.041.11
0.86
1.82
👆🏻
Mulliken-Jaffe Electronegativity
1.08NA
0.62
2.48
👆🏻
Allen Electronegativity
1.03NA
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
3.002.70
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
589.80 kJ/mol587.00 kJ/mol
375.7
26130
👆🏻
2nd Energy Level
1,145.40 kJ/mol1,110.00 kJ/mol
710.2162
28750
👆🏻
3rd Energy Level
4,912.40 kJ/mol1,978.00 kJ/mol
1600
34230
👆🏻
4th Energy Level
6,491.00 kJ/mol2,780.00 kJ/mol
2780
37066
👆🏻
5th Energy Level
8,153.00 kJ/molNA
4305.2
97510
👆🏻
6th Energy Level
10,496.00 kJ/molNA
5715.8
105800
👆🏻
7th Energy level
12,270.00 kJ/molNA
7226.8
114300
👆🏻
8th Energy Level
14,206.00 kJ/molNA
8857.4
125300
👆🏻
9th Energy Level
18,191.00 kJ/molNA
14110
134700
👆🏻
10th Energy Level
20,385.00 kJ/molNA
17100
144300
👆🏻
11th Energy Level
57,110.00 kJ/molNA
19900
169988
👆🏻
12th Energy Level
63,410.00 kJ/molNA
22219
189368
👆🏻
13th Energy Level
70,110.00 kJ/molNA
26930
76015
👆🏻
14th Energy Level
78,890.00 kJ/molNA
29196
86450
👆🏻
15th Energy Level
86,310.00 kJ/molNA
41987
97510
👆🏻
16th Energy Level
94,000.00 kJ/molNA
47206
109480
👆🏻
17th Energy Level
104,900.00 kJ/molNA
52737
122200
👆🏻
18th Energy Level
111,711.00 kJ/molNA
58570
134810
👆🏻
19th Energy Level
NANA
64702
148700
👆🏻
20th Energy Level
NANA
80400
171200
👆🏻
21st Energy Level
NANA
87000
179100
👆🏻
22nd Energy Level
NANA
93400
184900
👆🏻
23rd Energy Level
NANA
98420
198800
👆🏻
24th Energy Level
NANA
104400
195200
👆🏻
25th Energy Level
NANA
121900
121900
👆🏻
26th Energy Level
NANA
127700
127700
👆🏻
27th Energy Level
NANA
133800
133800
👆🏻
28th Energy Level
NANA
139800
139800
👆🏻
29th Energy Level
NANA
148100
148100
👆🏻
30th Energy Level
NANA
154500
154500
👆🏻
Electrochemical Equivalent
0.75 g/amp-hr2.16 g/amp-hr
0.16812
8.3209
👆🏻
Electron Work Function
2.87 eV3.41 eV
2.14
5.65
👆🏻
Other Chemical Properties
Chemical Stability, Flammability, Ionization, Solubility
Corrosion, Ionization, Radioactive Isotopes, Radioactivity