Chemistry
Use this atomic number lookup to calculate find an element by atomic number and view its symbol, mass, group, period, and category.
Calculator
Element result
Potassium
Atomic number
19
Atomic mass
39.0983 u
Group
1
Period
4
Block
s-block
Phase at room temp
solid
Potassium is a soft alkali metal and an essential electrolyte in living organisms.
Electron configuration
[Ar] 4s1
Electronegativity
0.82
Density
0.862 g/cm3
Melting point
336.53 K
Boiling point
1032 K
Discovered by
Humphry Davy
Year discovered
1807
Common uses
Fertilizers, Glass, Soaps, Biological electrolytes
Celsius
25 C
Fahrenheit
77 F
Kelvin
298.15 K
At this temperature, Potassium is expected to be solid.
Melting point: 336.53 K
Boiling point: 1032 K
Physical state estimates are based on standard pressure and may change under different pressure conditions.
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Trust note
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Atomic number lookup = exact element match
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Worked example
Atomic number: 26
Calculator guide
Find an element by atomic number and view its symbol, mass, group, period, and category.
References
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