dolor (plural dolors) ( 1 literary) Sorrow, grief, misery or anguish. 2  A unit of pain used to theoretically weigh people's outcomes.
Potassium, K. Reaction with water. When a small piece of potassium is added to water, it produces a hissing sound as it burns with a lilac flame. It also moves about quickly on the water surface. [ image ]. Hydrogen gas is given out in the reaction. The resulting alkaline solution will turn red litmus blue because of the potassium hydroxide formed.
All elements of the alkali metals (lithium [Li], sodium [Na], potassium [K}, rubidium [Rb], cesium [Cs] and francium [Fr]) group will react violently when placed in water. The further from the top, the more violent the reaction will be. This happens due to their very high reactivities and thus, they are kept in kerosene oil.