Question

What Is Potassium?


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Answer 1

Potassium

Chemical element

Potassium is a chemical element with the symbol K and atomic number 19. Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure.

Symbol: K

Atomic mass: 39.0983 u

Atomic number: 19

Electron configuration: [Ar] 4s¹

Van der Waals radius: 280 pm

Melting point: 63.5 °C

Answer 2

Answer:

Potassium is a chemical element with the symbol K and atomic number 19. Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure.