Two students collect data on three unknown samples in the

Last updated: 5/4/2023

Two students collect data on three unknown samples in the lab Their data is presented in the table below Number of protons Number of neutrons Number of electrons Appearance Reacts with acid Mass Number Element X 19 21 19 solid dull gray yes 40 Element Y 20 20 20 solid dull light gray yes 40 Element Z unknown unknown New data determines that Element Z has 20 protons 19 solid dull gray yes 40 Student 1 turned in his lab sheet stating that all three samples must be the same element because their appearance reactivity with acid and mass number were all the same Student 2 disagreed and wrote that Element X and Z were the same while Element Y was different She argued that the similar appearance identical number of electrons and identical mass number means that Element X and Z are the same element Which of the following would be most likely to disprove the second student s argument