1- Nitrogen 5- Oxygen maybe, i can't find it on the periodic table
It seems that nitrogen is, but its odd tbh.
Answer:
The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen.
:-))
The elements in each pair have in common it that they are metaloids
