Choose the element that is not in the same period as potassium. arsenic b. calcium c. copper d. bromine e. sodium

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work