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### Theory:

We all have a name, and we named the materials and objects in our surroundings to identify them. Similarly, scientists have also named atoms and given unique symbols to identify them.

Biometric Identification

Now let's take a look at those symbols of the elements.
Symbols of elements:
Jöns Jacob Berzelius, a Swedish chemist, proposed that element symbols be made up of one or two letters from the element's name.

Jöns Jacob Berzelius

We can see that each element has a name and a unique chemical symbol. Some elements' symbols are made up of the first letter of the name and a letter that appears later in the name.
But, John Dalton was the first scientist to use the symbols for elements in a very specific sense. Below we see the symbols of the atoms proposed by John Dalton.

We can see that each element has a name and a unique chemical symbol. Some elements' symbols are made up of the first letter of the name and a letter that appears later in the name.
Example:
(i) Hydrogen - H

(ii) Magnesium - Mg
But some elements named after another language like Greek and Latin, so those elements would be different from others.
Example:
i) The symbol of iron is $$Fe$$ from its Latin name Ferrum $$(Fe)$$.

ii) Potassium symbol is $$K$$ from Kalium $$(K)$$.

iii) Sodium symbol is $$Na$$ from Natrium $$(Na)$$.

Nowadays, elements names are authorised by the IUPAC (International Union of Pure and Applied Chemistry).