potasum can hold 18electrons in its third shell. Then why potasium has one electron in fourth shell?
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Potassium has valency +1 and has 19 electrons.
If we see it's configuration, it'll be
1s² 2s² 2p6 3s² 3p6 4s¹
Hence, it has only 1 electron in its 4th shell.
If we see it's configuration, it'll be
1s² 2s² 2p6 3s² 3p6 4s¹
Hence, it has only 1 electron in its 4th shell.
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