You are given a type of element by a teacher and she asks you to identify it. What should you do?Explain your answer​

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

Nonpoint source pollution is difficult to control because it