____ is a yellow diatomic gas. ____ is a greenish-yellow diatomic gas. ____ is also diatomic, but it is a red-brown liquid at room temperature, with a high vapor pressure. Quite interestingly, this characteristic applies only to bromine and ____. All other elements, in their most stable allotrope, are either solid or gas at room temperature. And finally ____ is a purple-black solid, whose crystals easily sublime to generate a deep violet vapor. Moving on to applications, silver bromide and silver iodide are used in ____. Sodium hypochlorite is the primary component of ____. Chlorine is also important for ____ wood pulp and cotton cloth. Sodium chloride is table ____, ubiquitous in cooking. Potassium iodide is added to table salt in trace amounts to counter iodine deficiency, which impacts ____ function. Fluorine is found in interesting compounds like ____, which is useful in creating ____ surfaces for a variety of products, and there are also many important fluorinated pharmaceuticals. Chlorofluorocarbons, such as freon, were used as nontoxic ____, though this was eventually discontinued as it was discovered that these compounds were damaging the ____ layer. Fluoride, the anion of fluorine, is added to many public drinking ____ supplies to enhance ____ health, as we discussed at great length in this video here. Chlorine is used as a ____ in community water supplies, while bromine is used as a disinfectant in hot water, like in hot tubs and some pools. Iodine is a co-catalyst in the Monsanto acetic acid synthesis, which we will cover later in the series. It is also used as a topical ____, while iodine in alcohol solution is used as an ____. Silver iodide is used in seeding ____ to induce rain. Astatine has no known applications, though it is under investigation as to whether it has utility in ____ for prostate cancer. And of course Tennessine, as one might imagine, has no ____ due to its extremely short half-life. And with that we’ve covered another group on the periodic table, the halogens.

Halogens

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