Periodic Table Element Comparison: Compare Elements - Potassium vs Sodium
Compare Potassium and Sodium
Compare Potassium and Sodium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Potassium vs Sodium with most reliable information about their properties, attributes, facts, uses etc. You can compare K vs Na on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.
Facts
Name |
Atomic Number |
Atomic Symbol |
Atomic Weight |
Phase |
Color |
Classification |
Group in Periodic Table |
Group Name |
Period in Periodic Table |
Block in Periodic Table |
Electronic Configuration |
Melting Point |
Boiling Point |
Electronic Shell Structure |
CAS Number |
Neighborhood Elements |
Potassium |
19 |
K |
39.0983 |
Solid |
Silver |
alkali metal |
1 |
lithium family |
4 |
s |
[Ar] 4s1 |
63.38 °C |
759 °C |
2, 8, 8, 1 |
CAS7440-09-7 |
Neighborhood Elements of Potassium |
Sodium |
11 |
Na |
22.98977 |
Solid |
Silver |
alkali metal |
1 |
lithium family |
3 |
s |
[Ne] 3s1 |
97.72 °C |
883 °C |
2, 8, 1 |
CAS7440-23-5 |
Neighborhood Elements of Sodium |
History
History |
The element Potassium was discovered by Humphry Davy in year 1807 in United Kingdom. Potassium derived its name from from New Latin potassa, 'potash' (kalium in Latin) |
The element Sodium was discovered by Humphry Davy in year 1807 in United Kingdom. Sodium derived its name derived its name from from the English word soda (natrium in Latin) |
Presence: Abundance in Nature and Around Us
3e-06 |
4e-06 |
0.0007 |
0.015 |
0.00042 |
0.002 |
2e-05 |
4e-05 |
0.0055 |
0.023 |
0.011 |
0.0014 |
Crystal Structure and Atomic Structure
Atomic Radius |
Atomic Volume |
Covalent Radius |
Van der Waals Radius |
Neutron Cross Section |
Atomic Spectrum |
Lattice Constant |
Lattice Angle |
Space Group Name |
Space Group Number |
Crystal Structure |
243 pm |
45.67558411215 cm3 |
196 pm |
275 pm |
2.1 |
![]() |
532.8, 532.8, 532.8 pm |
π/2, π/2, π/2 |
Im_ 3m |
229 |
Body Centered Cubic ![]() |
190 pm |
23.749762396694 cm3 |
154 pm |
227 pm |
0.53 |
![]() |
429.06, 429.06, 429.06 pm |
π/2, π/2, π/2 |
Im_ 3m |
229 |
Body Centered Cubic ![]() |
Atomic and Orbital Properties
Atomic Number |
Number of Electrons (with no charge) |
Number of Protons |
Mass Number |
Number of Neutrons |
Shell structure (Electrons per energy level) |
Electron Configuration |
Valence Electrons |
Oxidation State |
Atomic Term Symbol (Quantum Numbers) |
Shell structure |
19 |
19 |
19 |
39.0983 |
20.0983 |
2, 8, 8, 1 |
[Ar] 4s1 |
4s1 |
-1 1 |
2S1/2 |
![]() |
11 |
11 |
11 |
22.98977 |
11.98977 |
2, 8, 1 |
[Ne] 3s1 |
3s1 |
-1 1 |
2S1/2 |
![]() |
Isotopes - Nuclear Properties
Isotopes |
Naturally occurring stable
isotopes: 39K, 41K. |
Naturally occurring stable
isotopes: 23Na. |
Chemical Properties: Ionization Energies and electron affinity
1 |
0.82 |
48.4 kJ/mol |
418.8, 3052, 4420, 5877, 7975, 9590, 11343, 14944, 16963.7, 48610 kJ/mol |
1 |
0.93 |
52.8 kJ/mol |
495.8, 4562, 6910.3, 9543, 13354, 16613, 20117, 25496, 28932, 141362 kJ/mol |
Physical Properties
Density |
Molar Volume |
Elastic Properties |
Young Modulus |
Shear Modulus |
Bulk Modulus |
Poisson Ratio |
Hardness - Tests to Measure of Hardness of Element |
Mohs Hardness |
Vickers Hardness |
Brinell Hardness |
Electrical Properties |
Electrical Conductivity |
Resistivity |
Superconducting Point |
Heat and Conduction Properties |
Thermal Conductivity |
Thermal Expansion |
Magnetic Properties |
Magnetic Type |
Curie Point |
Mass Magnetic Susceptibility |
Molar Magnetic Susceptibility |
Volume Magnetic Susceptibility |
Optical Properties |
Refractive Index |
Acoustic Properties |
Speed of Sound |
0.856 g/cm3 |
45.67558411215 |
N/A |
1.3 GPa |
3.1 GPa |
N/A |
0.4 MPa |
N/A |
0.363 MPa |
1.4×107 S/m |
7×10-8 m Ω |
N/A |
100 W/(m K) |
N/A |
Paramagnetic |
N/A |
6.7×10-9 |
2.62×10-10 |
5.74×10-6 |
N/A |
2×103 m/s |
0.968 g/cm3 |
23.749762396694 |
10 GPa |
3.3 GPa |
6.3 GPa |
N/A |
0.5 MPa |
N/A |
0.69 MPa |
2.1×107 S/m |
4.7×10-8 m Ω |
N/A |
140 W/(m K) |
0.000071 K-1 |
Paramagnetic |
N/A |
8.8×10-9 |
2×10-10 |
8.5×10-6 |
N/A |
3.2×103 m/s |
Thermal Properties - Enthalpies and thermodynamics
63.38 °C |
759 °C |
2223 K |
N/A |
2.33 kJ/mol |
76.9 kJ/mol |
-182 J/(kg K) |
97.72 °C |
883 °C |
2573 K |
N/A |
2.6 kJ/mol |
97.7 kJ/mol |
N/A |
Regulatory and Health - Health and Safety Parameters and Guidelines
CAS Number |
RTECS Number |
DOT Hazard Class |
DOT Numbers |
EU Number |
NFPA Fire Rating |
NFPA Hazards |
NFPA Health Rating |
NFPA Reactivity Rating |
More |
AutoIgnition Point |
Flashpoint |
CAS7440-09-7 |
RTECSTS6460000 |
4.3 |
2257 |
N/A |
3 |
Water Reactive |
3 |
2 |
440 °C |
N/A |
CAS7440-23-5 |
RTECSVY0686000 |
4.3 |
1428 |
N/A |
3 |
Water Reactive |
3 |
2 |
115 °C |
4 °C |