What did james Chadwick discover A. proton B. neutron C. electron

In which of these cases are the two wave points considered to be in phase with each other?

Will a solution form when the solvent and solute are both nonpolar? a. not likely b. never c. most likely

4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.