The first four I.E. values of an element are \( 284,412,656 \) and \( 3210 \mathrm{~kJ} \mathrm{...

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The first four I.E. values of an element are \( 284,412,656 \) and \( 3210 \mathrm{~kJ} \mathrm{~mol}^{-1} \). The number of valence electrons in the element are :
\( P \)
(a) one
(b) two
(c) three
(d) four
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