The ionization potentials of \( \mathrm{Li} \) and \( \mathrm{K} \)...

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The ionization potentials of \( \mathrm{Li} \) and \( \mathrm{K} \) are 5.4 and 4.3
P \( \mathrm{eV} \) respectively. The ionization potential of \( \mathrm{Na} \) will

W be:
(1) \( 9.7 \mathrm{eV} \)
(2) \( 1.1 \mathrm{eV} \)
(3) \( 4.9 \mathrm{eV} \)
(4) cannot be calculated
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