Brown algae (Phaeophyta) includes Kelps (Macrocystis, Laminaria) and Ascophyllum, Fucus, and Sargassum. Alginic Acid (Alginate) is a colloidal product used for thickening, suspending, stabilizing, emulsifying, gel-forming, or film-forming, as required. 1  About half of the alginate produced is used for making ice cream and other dairy products, the rest is used in other products, including shaving cream, rubber, or paint.
Lithium is a Group 1 (IA) element containing just a single valence electron (1s 2 2s 1). Group 1 elements are called alkali metals. Lithium is a solid only about half as dense as water and lithium metal is the least dense metal. A freshly cut chunk of lithium is silvery, but tarnishes in a minute or so in air to give a grey surface. Its chemistry is dominated by its tendency to lose an electron to form Li + .
Lithium is the lightest metallic element. The alkali metals have low melting points, ranging from a high of 179 Â°C (354 Â°F) for lithium to a low of 28.5 Â°C (83.3 Â°F) for cesium. Alloys of alkali metals exist that melt as low as â78 Â°C (â109 Â°F). The alkali metals react readily with atmospheric oxygen and water vapour.