When an atom loses one or more electrons, this atom becomes a
(1) positive ion with a radius smaller than the radius of this atom
(2) positive ion with a radius larger than the radius of this atom
(3) negative ion with a radius smaller than the radius of this atom
(4) negative ion with a radius larger than the radius of this atom

Answer;

(2) positive ion with a radius larger than the radius of this atom

Explanation;

-Atomic radius of an element is the measure of the size of its atom, while the ionic radius measures the size of an ion.

-When the atom loses its outermost electron it forms positively charged or cation. The ionic radius of the cation will be smaller than the atomic radius because the atom loses an electron energy shell.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.