the noble gases atre very unreactive and are oderless, tasteless and clourless under standard conditions whereas the group 7 halogens are a very reactive group.
They're not considered to be similar. Noble gases already have an octet and will usually be seen as single, stable atoms. Halogens are one electron short of a filled valence shell, so they are often...
Halogens make chemical reactions with other atoms easily, they bond with the atoms on the left side of the periodic table by receiving one electron and becoming a negative ion, and then attracting...
noble gases really are just that: noble. they dont react to things easily. halogens on the other hand, do react extremely easily. that is one of the main differences between the two.