Los halógenos

Halogens, including fluorine, chlorine, bromine, iodine, and astatine, are highly reactive non-metals due to their electron configuration. They form salts with metals and exist as diatomic molecules in nature. Their physical states vary from gases to solids down the group, with reactivity decreasing due to increased electron shell shielding. Halogens are used for disinfection and in medicine but can be environmentally damaging, as seen with chlorofluorocarbons affecting the ozone layer.

Describe the trend in melting and boiling points of halogens as you go down the group.

What are some uses of halogens in medical treatments?