In an illustration, lines of force are drawn around a magnet to illustrate the magnetic

Magnetic Field

When a unit charge or point charge is placed in the electric field of another charged particle, it will experience a force. The direction of this force are represented by drawing some imaginary lines which are called electric lines of force. The magnetic lines of force, or flux, leave the north pole and enter the south pole.

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.