Because of fluorine's high electronegativity, less energy is required to make F^2- from ^- than to make O^2-from O^-.

Name: Because of fluorine's high electronegativity, less energy is required to make F 2- from - than to make O 2- from O - .
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Fluorine's high electronegativity makes it less likely to gain an additional electron to form F²⁻, as it already achieves a stable electron configuration with one extra electron (F⁻). Oxygen, however, can more readily gain a second electron to form O²⁻.

Because of Fluorine's High Electronegativity, Less Energy Is Required to Make