Question

In Mendeleev's periodic table, elements are arranged in the

• A. ascending order of atomic mass
• B. descending order of atomic mass
• C. descending order of atomic number
• D. ascending order of atomic number

Answer 1

Answer:

A. ascending order of atomic mass

• Dmitri Mendeleev, the father of the periodic table, formulated the Periodic Law in 1869, which stated that the physical and chemical properties of elements are a periodic function of their atomic weights (masses).