how are symbols derived to represent various elements? give suitable example
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Dalton was the first scientist to use the symbols for the elements in a very specific sense. When he used a symbol for an element he also meant a definite quantity of that element, that is, one atom of that element.
Berzilius suggested that the symbols of the elements be made from one or two letters of the name of the element.
In the beginning, the names of the elements were derived from the name of the place where they were found for the first time. For example, the name copper was taken from Cyprus. Some names were taken from specific colours. For example, gold was taken from the English word meaning yellow.
Now-a-days, IUPAC (International Union of Pure and Applied Chemistry) approves names of elements.
Many of the symbols are the first one or two letters of the element's name in English. The first letter of a symbol is always written as a capital letter (uppercase) and the second letter as a small letter (lowercase). For example, (i) hydrogen (H), (ii) aluminium (Al), (iii) cobalt (Co).
Symbols of the some elements are formed from the first letter of the name and a letter, appearing later in the name. For example, (i) chlorine (Cl), (ii) zinc(Zn).
Other symbols have been taken from the names of the elements in Latin, German or Greek. For example, the symbol of iron is De from its Latin name ferrum, sodium is Na from natrium, potassium is K from kalium. Therefore, each element has a name and a unique chemical symbol.