Question

State mendeleev's periodic law. write two achievements of mendeleev's periodic table.

Answer 1

Answer:

properties of elements are period functions of their atomic masses.

Mendeleev had to place an element with slightly greater atomic mass

Mendeleveev boldly predicted the existence of some element that had not discovered at that time

Answer 2

Answer:

The law that the properties of the elements are periodic functions of their atomic numbers.

Also called Mendeleev's law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights