In step 2.4, you estimated the total beta-radiation exposure you will experience in 3 hours of lab work with the Cs-137 source working from the assumption that the emitted radiation was primarily in the form of beta particles. After these shielding experiments, how valid do you think that assumption was

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

Which element is the least metallic between cadmium, silver, zinc, or iron?