<Li> Noble gases -- The elements of group 18 : He , Ne , Ar , Kr , Xe , Rn . ( Og had not yet been named when the 2005 IUPAC Red Book was published , and its chemical properties are not yet experimentally known . ) </Li>
<Li> Noble gases -- The elements of group 18 : He , Ne , Ar , Kr , Xe , Rn . ( Og had not yet been named when the 2005 IUPAC Red Book was published , and its chemical properties are not yet experimentally known . ) </Li>
which list of elements belongs to the family commonly called the noble gases
which list of elements belongs to the family commonly called the noble gases
He Ne Ar Kr Xe Rn
He Ne Ar Kr Xe Rn