A one or two letter symbol indicating a particular element two words no spaces

The Symbols of elements is given by:

IUPAC : International Union Of Pure and Applied Chemistry.

Its is the Universally recognuised organisation which works on Chemical nomenclature and terminology.

Explanation:

According to IUPAC the elements are named according to mythological concept of country, mineral, place, property and scientist.

Ex:Copper name comes from the old english word Cyprus.

Rules of Naming elements:

1. The first Alphabet of the element is always Capital. Example:-

Sodium : Na not ''na'

2. The second alphabet is always small. Example

Sodium : Na not ''nA' or NA

3. For most of the elements, The symbol of the element comes from the first two words.

Example : Hydrogen : H

Helium : He

Copper : Cu

Rules for naming elements having mass> 100

1. The names are derived directly from the atomic number.

Ex : 0 = nil 1 = un 2=bi 3=tri

2. The name always ends with ''ium''

For example:

102 = Unnilbium