smallest atom in second energy level, largest atom in second energy level, group 13 element with lower electronegativity, group 13 element with higher electronegativity, alkali metal with lowest ionization energy, atom with highest electronegativity, atom in 5th energy level that is larger as an ion than as a neutral atom, atom in the 5th energy level that is smaller as an ion than as a neutral atom, atom in row 6 with unknown electronegativity , atom in row 6 that will gain electrons as an ion, atom in row 6 that will lose electrons to form an ion, atom with 6 valence electrons, atom with 5 valence electrons.

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