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A group of students are given the following information about three isotopes of uranium and tasked to estimate the average atomic mass.
Student 1: The average atomic mass is greater than 239 because it is the highest mass.
Student 2: The average atomic mass is greater than 238 because it is between the lowest and highest mass.
Student 3: The average atomic mass is close to 235 because it has the highest abundance.
Student 4: The average atomic mass is close to 237 because it is the average of all three masses.
