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Potassium
Potassium is the 19th element in the periodic table, we can only find compounds containing potassium in nature. It's sometimes used as a heat exchange medium.
Who discovered it:Humphry Davy
When was it discovered:1807
Symbol:K
Group:1
Row:4
Number of Protons(+):19
Number of Neutrons:20
Number of Electrons(-):19
Atomic Mass: 39.0983 u ± 0.0001 u
Electron Configuration:[Ar]4s
1
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