Matter is anything that has mass and takes up space (volume). How does volume change as matter changes state?
A.) Matter becomes more dense as it moves from gas to solid state. B.)Matter becomes less dense as it moves from gas to solid state.
C.)The density of matter remains the same, only energy of the atoms changes. D.)matter becomes more dense as it moves from solid to gas.

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.