Answer:
i think it would be B. Aluminum, Al and D. Boron, B
Explanation:
since they're both in group 13 and they forms a 3+ ion
The 26th is Fe(iron) and the 50th is Sn(tin)
The advantage is that we do not run out of resources and a disadvantage is that is dangerous when a “human” gets too close and gets sick by the radiation.
They are similar because they are all colors in the spectrum and they are different because you cant seperate primary colors but you can seperate secondary
