According to modern periodic law, variations in the properties of elements is related to their:
Correct answer: C. atomic numbers.
- A. atomic weight.
- B. nuclear weight.
- C. atomic numbers.
- D. neutron-proton ratios.
Explanation
The Modern periodic law states "The chemical and physical properties of elements are a periodic function of their atomic numbers". Therefore, option C is correct.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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