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Group 18 Noble Gases
Characteristics of Group 18 (Noble Gases/Inert Gases):
1. Noble gases are the most stable, least active of the elements (because they have a complete valence shell of 8).
2. Noble gases have almost no electronegativity (attraction for elements) because they are already full.
3. Highest ionization energy (they don’t want to give up any electrons) 4.Noble gases are found in nature as MONATOMIC atoms (one atom by itself)
because they don’t like to bond. (They are already complete.)
Exception: Kr and Xe sometimes bond with F. (On the Periodic Table, you
will see oxidation states, besides zero, next to these elements.)
102 © UNIT 3: PERIODIC TABLE OF ELEMENTS
