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Fluorine
Helium
Francium
Krypton
Potassium
Iron
Column B
Element with the smallest atomic radius in period 4 of the
periodic table
b. Most reactive metal in period 4 of the periodic table
c. Element with the lowest ionization energy but the largest
radius on the periodic table
d. Transition metal in period 4 of the periodic table with a
larger radius than copper, a higher ionization energy than
vanadium, and a higher electronegativity than osmium.
e. Element with the highest electronegativity on the entire
periodic table
f.
Element with the highest ionization energy on the
periodic table


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