According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of ________.

According to Mendeleev's periodic law, the elements were arranged in t

1.	According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of ________.
A.	Increasing atomic masses
B.	Decreasing atomic masses
C.	Decreasing atomic number
D.	Increasing atomic number
Answer» B. Decreasing atomic masses