Which one of the following elements has the largest second ionization energy:
Correct answer: C. Na
- A. O
- B. F
- C. Na
- D. N
Explanation
Na has the largest second ionization energy as the second electron is removed from an inner shell, thus the nuclear charge acting on it is stronger and more energy is needed to remove an electron. After losing 1st electron, sodium gains electronic configuration of Neon (noble gas) which has completely filled orbital so it has the highest second ionization energy.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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