Latin name:
Kalium
English name:
Potassium
Year discovered:
1807
CAS Number:
CAS7440-09-7
Discovered by:
Humphry Davy
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Electron shell:
K2 L8 M8 N1 O0 P0 Q0 R0
Electrons:19
Protons:19
Neutrons:20
Atomic number:
19
Atomic weight (Relative atomic mass):
39.0983(g/mol)
Density:
0.856 (g/cm³) (g/cm³)
Melting point:
63.38°C = 146.08°F = 336.53K
Boiling point:
758.8°C = 1397.84°F = 1031.95K
Phase:
Solid
Valence:
I
Period:
4
Group:
IA
Block:
s - block
Electron configuration:
[Ar]4s1
1s2 2s2 2p6 3s2 3p6 4s1
Oxidation states:
+1
Ion charge:
K+
The ionisation potential of an atom:
4.32 (eV)
Atomic radius:
235 (pm)
Covalent radius:
196 (pm)
Van der Waals radius:
275 (pm)
Valence:
I
Electron affinity:
48.4 (kJ/mole)
Electrical conductivity:
1.4 ⋅ 107 (S/m)
Electrical type:
Conductor
Magnetic type:
----
Volume magnetic susceptibility:
0.00000574
Mass magnetic susceptibility:
0.000000000262
Molar magnetic susceptibility:
2.62 ⋅ 10-10 (m³/mol)
Superconducting point:
----
Crystal structure:
Body-centered cubic
Grid parameters:
5.332 Å
Attitude c/a :
----
Debye temperature:
-173.15°C = -279.67°F = 100.0K
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