Food additives from seaweeds. Food additives made from seaweeds are mainly polysaccharides, long-chained molecules that are extracted from brown and red algae. These fall into three families: agars and carrageenans from red algae, and alginates from brown algae. Their usefulness mainly lies in their ability to emulsify, stabilise and thicken, but the fact that they come from a natural source is, these days, a major advantage.
Sodium /ËsoÊdiÉm/ is a chemical element with symbol Na (from New Latin natrium) and atomic number 11.It is a soft, silver-white, highly reactive metal.odium was first isolated by Humphry Davy in 1807 by the electrolysis of sodium hydroxide. Many sodium compounds are useful, such as sodium hydroxide (lye) for soap-making and sodium chloride for use as a de-icing agent and a nutrient (edible salt). Sodium is an essential element for all animals and some plants.
A lithium ion has the same electronic structure as a helium atom (He). Sodium, Na. Sodium is also in Group 1. It has one electron in its outer shell. When this electron is lost, a sodium ion Na + is formed. A sodium ion has the same electronic structure as a neon atom (Ne). Magnesium, Mg. Magnesium is in Group 2. It has two electrons in its outer shell. When these electrons are lost, a magnesium ion Mg 2+ is formed. A magnesium ion has the same electronic structure as a neon atom (Ne). Calcium, Ca