Chemical element of metals. Cu comes from Cuprum, Fe comes from Ferrum, Ag from Argentum. The symbols were not followed by a period (full stop) as with abbreviations. Later chemical elements were also assigned unique chemical symbols, based on the name of the element, but not necessarily in English. For example, sodium has the chemical symbol 'Na' after the Latin "natrium". The same applies to "W" (wolfram) for tungsten, "Fe" (ferrum) for iron, "Hg" (hydrargyrum) for mercury, "Sn" (stannum) for tin, "K" (kalium) for potassium, "Au" (aurum) for gold, "Ag" (argentum) for silver, "Pb" (plumbum) for lead, "Cu" (cuprum) for copper, and
Potassium bicarbonate bicarbonate occurs between : It is manufactured by reversing the above: reaction of potassium carbonate with carbon dioxide and water: This compound is a source of carbon dioxide for leavening in baking, extinguishing fire in dry chemical fire extinguishers, acting as a reagent, and a strong buffering agent in medications. It is used as an additive in winemaking and as a base in foods and to regulate pH. Potassium bicarbonate is often found added to club soda to improve taste, to soften the effect of effervescence. Potassium bicarbonate is used as a fire suppression agent ("BC dry chemical") in some