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The no of valance electrons in potassium atom are

$\begin{array}{1 1}(a)\;2&(b)\;1\\(c)\;3&(d)\;5\end{array}$

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$K=(Ar)4s^1$
The no of valance electrons in potassium atom is 1.
Hence (b) is the correct option.
answered Jan 27, 2014 by sreemathi.v
 
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