The correct answer among the choices would be:
D. Fluorine (F)
Among all the elements, fluorine is the most electronegative
element. Electronegativity refers to the measure of tendency of an electron to
be attracted to that element. Since Fluorine is very electronegative, it can
easily absorb the electrons of other elements. Since it sucks up electron, this
gives Fluorine an excess electron thus making it a negative ion F-.
