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Final answer:
Explanation of first ionization energy, atomic radius, and metal reactivity in periodic table elements.
Explanation:
First Ionization Energy: The order of increasing first ionization energy for the atoms F, Li, N, Rb is: Rb < Li < N < F. Rb has the lowest first ionization energy while F has the highest.
Atomic Radius: The order of increasing atomic radius for Li, Rb, N, F, I is: I < F < N < Rb < Li. Lithium has the smallest atomic radius, and Rb has the largest.
Reactivity: Metals like sodium easily lose their valence electrons, leading to the formation of stable cations. Soduim readily forms ions by losing its valence electron to participate in reactions.
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