Q- Imagine that in another universe, atoms and elements are identical to ours, except that atoms with six valence electrons have particular stability (in contrast to our universe where atoms with eight valence electrons have particular stability). Give an example of an element in the alternative universe that corresponds to:

A- a noble gas with the principal quantum number of the outermost electrons of 3.

B- a reactive nonmetal with the principal quantum number of the outermost electrons of 3.

C- a reactive metal with the principal quantum number of the outermost electrons of 3.

((The correct answers are NOT Ar or Cl or Na))