Successive ionization energies of an element \( X \) are given below (in K.Cal) :\( \begin{arr...
Successive ionization energies of an element \( X \) are given below (in K.Cal) :\( \begin{array}{llll}\mathbf{I P}_{1} & \mathbf{I P}_{2} & \mathbf{I P}_{3} & \mathbf{I P}_{4} \\ 165 & 195 & 556 & 595\end{array} \)IVElectronic configuration of the element \( \mathrm{X} \) is -(1) \( 1 \mathrm{~s}^{2}, 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6}, 3 \mathrm{~s}^{2} 3 \mathrm{p}^{2} \) (2) \( 1 \mathrm{~s}^{2}, 2 \mathrm{~s}^{1} \)(3) \( 1 \mathrm{~s}^{2}, 2 \mathrm{~s}^{2} 2 \mathrm{p}^{2} \)(4) \( 1 \mathrm{~s}^{2}, 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6}, 3 \mathrm{~s}^{2} \)
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