Chemists investigated an unknown substance and found it to have the following characteristics: -different components could be observed in the substance. -different samples of the substance appeared to have different proportions of the components. -the components could be easily separated using filters and sorting. which statement most accurately describes this substance? a. the substance is a compound. b. the substance is an element. c. the substance is a heterogeneous mixture. d. the substance is a homogeneous mixture.

D the substance is a homogeneous mixture

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.