Recall that a period is horizontal, and a group is vertical.
So if cobalt is moving "down" a period, it would be most logical to say that it would be Ni, or nickel. It could also be Copper, Zinc, Gallium, and so on. Make sense?
The factors of 2^5 are 1 and 2
Answer:
A
Explanation:
both DNA and RNA are nucleic acids
the key element in the ecological concept of species is that individuals within a species can successfully interbreed and conceive healthy offspring
