Question

Which of the following does not reflect the periodicity of elements?

• A. Bonding behaviour
• B. Electronegativity
• C. Ionisation potential
• D. Neutron/proton ratio

Answer 1

The correct option is D Neutron/proton ratio

The neutron/proton ratio does not reflect the periodicity of elements. Rest are all periodic properties of elements. The neutron-proton ratio ($N/Z$ ratio or nuclear ratio) of an atomic nucleus is the ratio of its number of neutrons to its number protons. It basically increases with the increase in atomic number unevenly.