The electronic configuration of potassium is 2, 8, 8, 1 and not 2, 8, 9.

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Detailed Solution

The above statement is true.
●        According to the Octet rule the electrons filled in the atom in the way as 2,8,8,16,16,32,32.
●        Due to their such Octet follow up rule they form a periodic table,In periodic table the elements are arranged according to their similar nature and this nature is decided by this way of arrangement of electrons.
●        In Potassium the number of electrons is 19, So it's arrangement is 2,8,8,1 rather than 2,8,9.

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