What is the name of the term that describes the conditions that are kept the same between all groups in an experiment?

Control or controlled group is the part of the experiment where conditions are kept the same.

i can ! i just need to know what the paragraph is! : p

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.