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Noble gases:
- It is located on the maximum right side of the modem
Location periodic table.
- It is the last group in p-block .
1.They are present in gaseous state.
2. Their outermost energy level contains 8 electrons,
General except Helium which contains only 2 electrons [ Helium
properties has only (K) energy level ].
3. Their valency equals zero, Because its outermost
energy levels saturated withelectrons.
4.They are chemically inactive elements, where
they don’t react with other elements under normal
conditions.
5. They exist in the form of monoatomic molecules
(formed of one atom only).
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