Members of group 18 in the modern periodic table are known as noble gases. They are colourless, odourless gases at room temperature, isolated by William Ramsay in 1898 from the air.
Inert Gases are:
The members of the group have eight electrons in their outermost orbit (except helium which has two electrons). Thus, they have a stable configuration. Group 18 elements are gases and chemically unreactive, which means they don’t form many compounds. Thus, the elements are known as inert gases. Like the other group elements, noble gas elements also exhibit trends in their physical and chemical properties. The general characteristics of noble gases are discussed below.
The noble gases are inert in nature because of their completely filled subshells. In 1962, the first compound of noble gases was prepared. It is hexafluoroplatinate (prepared by Bartlett).
Xe + PtF6 → Xe[PtF6]
Now, many compounds of Xe and Kr are known with fluorine and oxygen.
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1. What are inert gases? |
2. What are the general/physical characteristics of Group 18 elements? |
3. What are the chemical properties of Group 18 elements? |
4. How are Group 18 elements used in everyday life? |
5. What are some important properties of radon, an inert gas? |
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