Question
Mendeleev ordered the elements in his version of the periodic table according to their atomic masses instead of their atomic numbers. Why?
Step 1
The atomic mass of an element is the weighted average mass of the atoms in a naturally occurring sample of the element. It is usually expressed in atomic mass units (amu), where 1 amu = 1/12 the mass of a carbon-12 atom. On the other hand, the atomic number of an Show more…
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