were let D3. What were the criteria used by Mendeleev in creating 4. W – InterviewSolution

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1.	were let D3. What were the criteria used by Mendeleev in creating 4. Why do you think the noble gases are placed in a separate group?
Answer» Noble gases are placed separately in periodic table because : A) They have completely filled outer electronic shell configuration.B) They are inert in nature due to above mentioned regions.C) They all exhibit properties very different from all other elements of the periodic table as they do not make compounds ( there are exceptions tho like compounds of Xenon with oxygen and flourine ).

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