Question

Mendeleef arranged elements in increasing order of ______.
a.Atomic mass
b.Atomic number
C.Mass number​

Answer 1

Explanation:

Mendeleef arranged elements in increasing order of atomic mass option a

Answer 2

Answer:

Atomic masses

Explanation:

Mendeleev arranged the known elements in an increasing order of their atomic masses. According to Mendeleev's periodic law, the properties of elements are a periodic function of their atomic masses.