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
International Institute of Risk & Safety Management and training (in their own field of business) through IIRSM continuing professional development programme(CPD). The Institutes's CPD cycle lasts for 3 years. In order to maintain your RSP status you must bank a minimum of at least 30 credits over the 3 year period. The 30 credits must be spread across the following 3 sections (each section will require a minimum of 5 points): International Institute of Risk & Safety Management The International Institute of Risk & Safety Management (IIRSM) is a professional membership body for safety practitioners worldwide. It is a registered British Charity (number 1107666) and UK Company