Question

why do you think the noble gas are placed in seperate groups.​

Answer 1

Answer:

IT IS BECAUSE THEY HAVE FULL FILLED ELECTRON IN ITS OUTERMOST ORBIT.THEY DOESN'T REACT WITH ANY OTHER ELEMENT .THAT'S WHY THEY ARE PLCED IN SEPERATE 6 GROUP

Answer 2

$\: they \: are \: not \: reactive \: because \\ \: they \: have \: their \: outermost \: shell \: completely \: filled \: </p><p>\\ and \: therefore \: are \: placed \: in \: seperate \: group \:$