Lithium Lithium Lithium (from ) is a chemical element with symbol Li and atomic number 3. It is a soft, silvery-white alkali metal. Under standard conditions, it is the lightest metal and the lightest solid element. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. When cut, it exhibits a metallic luster, but moist air corrodes it quickly to a dull silvery gray, then black tarnish. It never occurs freely in nature, but only in (usually ionic) compounds, such as pegmatitic minerals which were once the main source of lithium. Due to its solubility
Extraordinary assumptions and hypothetical conditions on a hypothetical condition only under certain additional more restrictive conditions, specifically These requirements are specified in All USPAP standards dealing with appraisal reporting require that any written and oral appraisal report clearly and accurately disclose all assumptions, extraordinary assumptions, hypothetical conditions, and limiting conditions used in the assignment. These same reporting standards require that the reporting of appraisal assignment results must "clearly and conspicuously" state all extraordinary assumptions and hypothetical conditions and state that their use might have affected the assignment results. Appraisal reports written where USPAP compliance is a requirement or assignment condition will usually be written with