Atoms of which group in the periodic table have a valence shell electron configuration of ns2 np2? I tried 1 and 2 and it said they were wrong

Ineed with this also i hope you understand it

Ithink that the answer is b

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).