Sagot :
Answer:
1. Fluorine
Fluorine is assinged the oxidation number of -1 because it attracts the electrons in the bond more strongly than the carbon does. Thus, fluorine appears to have an extra electron, -1 oxidation number. F is the most electronegative element on the periodic table.
2. element T in group IIA has the least ionization energy.
3. silvery metal that tarnishes in air, burns easily and reacts with water. Scandium is mainly used for research purposes
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