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What are Noble Gases? Define Noble Gases
Noble Gases are used as a term in
Periodic Chemistry
when classifying the chemical elements. Each element can usually be classified
as a metal or a non-metal based on their general
Physical and Chemical Properties.
The 6 elements classified as "Noble Gases" are located in Group 18 of the
Periodic Table. Because the outermost electron
shell of atoms of these gases is full, they do not react chemically with other
substances except under certain special conditions. Noble Gases are also known
as the inert gases. The noble gases are not reactive. This is because they have
little tendency to gain or lose electrons. The elements categorised as Noble
Gases are used to make lighted signs, refrigerants, and lasers.
Origin of the term 'Noble Gas'
The term 'Noble gas' derives from the
Old High German word Edelgas from 'edili' meaning "noble". The name 'noble
gases' is an allusion to the old, similarly termed 'Noble Metals'. The Noble
Metals included Gold,
Silver and
Platinum. Noble Metals were so called due to their long association with the
aristocracy.
What are Noble Gases? Common Properties of Noble Gases
The common properties of Noble Gases include
a complete valence shell. They have high ionization energies and very low
electro-negativities. Noble gases are fairly non-reactive and have low boiling
points.
Common properties of Noble Gases
The elements classed as Noble Gases have the following properties in common:
-
They
are non-metals
-
Very
un-reactive gases
-
Colourless
-
Exist
as single atoms
-
Very
low electro-negativities
-
High
ionization energies
Noble Gases List - List of Chemical Elements in the Periodic Table
The elements contained in
the classification of Noble Gases list are as follows:
Elements classified as Noble Gases
The 6 elements classified as "Noble Gases" are located in
Group 18 of the Periodic Table. |
