You are waiting at the bus stop and see another school bus pass by. Which statement is true about a student riding on that bus? A. The student on the bus is not in motion relative to you.
B. The student on the bus is a stationary reference point relative to you.
C. You appear to be moving forward from the student's perspective.
D. The student on the school bus is not in motion relative to the bus.

where are the choice options?

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.