Which of the following pairs of elements could possibly be found in the same group on the periodic table?
A forms a 2+ ion; B is an alkaline earth metal.
A is a noble gas; B forms a 1- ion.
A has 3 valence electrons; B is a halogen.
A forms a 2- ion; B has the atomic number 12.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.