Question

Mendeleev saw trends in the physical and chemical properties of elements when he organized them by _____.


atomic number

physical properties

atomic weight

density

Answer 1

Answer:

atomic weight

Explanation:

Mendeleev realised that the physical and chemical properties of elements were related to their atomic weight

hope it helps4

Answer 2

Answer:

atomic number

Explanation:

the density just aint the right anser and yeah u already know