Sulfur hexafluoride (SF₆) is an extremely dense gas. In fact, it’s over five times heavier than air, making it capable of supporting light objects, like aluminum foil boats or small balloons and allowing them to "float" midair. This happens due to buoyancy, the same principle that allows objects to float in water. In this case, the "liquid" is a dense gas, and this gas pushes up with a force equal to the weight of the air the object would displace. If the object is light enough, it experiences a

SF6 Lewis structure, Molecular geometry, Bond angle, hybridization