Question

Why the periodicity of elements depends on the number of protons?

Answer 1

Explanation:

The Periodicity of properties depends upon the number of protons in an atom as a result of physical and chemical properties. Explanation: Atomic weight always depends on the number of protons and neutrons in the nucleus. Physical and chemical properties of the elements upon the atomic numbers not on the atomic weight

Answer 2

Answer:

The periodicity of elements depends on the number of protons because the number of protons affects the atomic number depending on which the periodic properties changes.

Explanation:

Atomic mass changes depending on the number of protons and neutrons in the nucleus. So in turn the physical and chemical properties of the elements rely on their atomic numbers more than the atomic masses. The periodic properties are based on the Periodic Law, which states that if the chemical elements are listed in order of increasing atomic number, many of their properties go through cyclical changes, with elements of matching properties recurring at intervals.