La densidad del agua es 10 g/cm3. Haz clic para indicar los objetos que flotan en el agua y los que se hunden. Un objeto podra flotar si la densidad es menor que la del agua y se hundirá si
su densidad es mayor
4 ountos
se hande​

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.