The Element Potassium
Potassium is classified as a metal and it never occurs in its elementary form on earth due to its extreme reactivity with water. It is also known to be an electropositive metal it is extremely difficult to extract potassium from minerals. However, using electrolysis pure potassium can be isolated from its hydroxide through a special process.
Apart from the many industrial applications such as usage in magnetometers, used in pH controls and included in dyes and stains potassium has biological value as it is an essential component in plant nutrition. Its components such as potassium chloride also play a significant role in human health and well being by being a substitute for table salt.
Atomic Number & Chemical Properties
Element Basics:
Chemical Symbol: K
Atomic Number: 19
Atomic Weight: 39.0983
Element Classification: Alkali Metal
Discovered By: Sir Humphrey Davy
Date of Discovery: 1807 (England)
Origin of Name: English: pot ash; symbol from Latin: kalium, (alkali).
How to Recognize it at a Party:
Soft, waxy, silvery-white metal
Seriously Atomic Information:
Density (g/cc): 0.856
Melting Point (°K): 336.8
Boiling Point (°K): 1047
Atomic Radius (pm): 235
Atomic Volume (cc/mol): 45.3
Covalent Radius (pm): 203
Ionic Radius: 133 (+1e)
Pauling Negativity Number: 0.82
First Ionizing Energy (kJ/mol): 418.5
Oxidation States: 1
Electronic Configuration: [Ar] 4s1
Getting Intimate with Potassium:
Lattice Structure: Body-Centered Cubic (BCC)
Lattice Constant (Å): 5.230
Lattice C/A Ratio: n/a
Specific Heat (@20°C J/g mol): 0.753
Fusion Heat (kJ/mol): 102.5
Evaporation Heat (kJ/mol): 2.33
Thermal Conductivity (@25°C W/m K):
Debye Temperature (°K): 100.00
Society's Questions About Potassium:
Have you ever wondered what everyone else in the world thinks about Potassium? Is anyone else looking for it too? If so, why? What do they want?
The following list shows the most common online questions about the element Potassium. Are your questions the same or different from everyone else's?
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