The successive ionization energies for element \( X \) is given below \( \mathrm{IE}_{1}: 250 \m...

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The successive ionization energies for element \( X \) is given below
\( \mathrm{IE}_{1}: 250 \mathrm{~kJ} \mathrm{~mol}^{-1} \) \( \mathrm{IE}_{2}: 820 \mathrm{~kJ} \mathrm{~mol}^{-1} \) \( \mathrm{IE}_{3}: 1100 \mathrm{~kJ} \mathrm{~mol}^{-1} \) \( \mathrm{IE}_{4}: 1400 \mathrm{~kJ} \mathrm{~mol}^{-1} \)
Find out the number of valence electrons for the element \( X \).
a. 3
b. 4
c. 2
d. 1
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