In Mendeleev’s Periodic Table, the elements were arranged in the
A. increasing order of their atomic numbers
B. decreasing order of their atomic numbers
C. increasing order of their atomic masses
D. decreasing order of their atomic masses
Answer:C
In Mendeleev’s Periodic Table, the elements were arranged in the
A. increasing order of their atomic numbers B. decreasing order of their atomic numbers C. increasing order of their atomic masses D. decreasing order of their atomic masses