Question

Which of the following concerning atomic mass is/are correct?
1) The atomic mass listed on a modern periodic table for each element is the mass of the most abundant isotope.
2) The atomic mass listed on a modern periodic table is a relative atomic mass, based on the definition that 12C equals 12 amu.
3) Relative atomic masses can only be determined with a mass spectrometer.
A) 1 only
B) 2 only
C) 1 and 2
D) 2 and 3
E) 1, 2, and 3

Answer

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