Problem: James is memorizing the periodic table and some of the features of the elements on it. He is currently working on the fourth row which starts with Potassium (K) on the far left and ends with Krypton (Kr) to the far right. Given two elements are in the same row of the periodic table, which element will have a higher number of elections, a metal or a nonmetal?

A: nonmetal

Problem: David was conducting experiments on chemical equilibrium in the chemistry lab. First, he took a chemical system that was at equilibrium. He labeled it as case E. Then he changed the temperature of the system. He labeled that experiment as case T. Finally, he observed two more experiments, case A and case B. In case A forward reaction was favored, and in case B reverse reaction was favored. In which case the reactants concentration would decrease, case A or case B?

A: case A

Problem: Gary and Joe are two farmers. Joe's farm has a depleted soil, while Gary started agroforestry a few years back, and grows cover crops. Which farmer helped to stabilize the soil more?

A: Gary

Problem: Two neighboring counties used different agricultural methods on their farm fields. Cook county used many fertilizers and pesticides, while Dane county used only organic methods and no pesticides. As a result, the waters in Dane county were cleaner. Which county used more chemicals that were picked up by rainwater?

A:
Cook