Period 6 element devices though concerns about the element's toxicity have led to mercury thermometers and sphygmomanometers being largely phased out in clinical environments in favor of alcohol-filled, galinstan-filled, digital, or thermistor-based instruments. It remains in use in scientific research applications and in amalgam material for dental restoration. It is used in lighting: electricity passed through mercury vapor in a phosphor tube produces short-wave ultraviolet light which then causes the phosphor to fluoresce, making visible light. Thallium is a chemical element with the symbol Tl and atomic number 81. This soft gray other metal resembles tin but discolors when exposed to air. The
Toxic colonialism the idea of economic relief at a seemingly minor, but substantial environment cost. In some instances, monetary funds are not the only thing exchanged between developed and developing nations, “Somali warring parties used to accept hazardous and highly toxic wastes in exchange of army and ammunition”. This example is an indication of the separation between developed and developing nation and shows the lengths that not only developing nations are willing to extend to meet their needs, it also shows the desperation of developed nations to remove themselves from handling excessive toxic waste commitments. Over the past few decades there have