Periodic law Original Scenario-Based Download PDF

Questions

1. 1.

   While surveying an uncharted asteroid belt, an automated probe analyzes a series of pure elemental specimens and attempts to index them based on their measured nuclear properties. The system's primary computer initially sorts the samples by total isotopic mass, but this creates inconsistencies where chemically inert substances end up grouped with highly reactive specimens. Which foundational principle must the probe adopt to restore a coherent pattern where chemical and physical properties recur systematically?

   • A) Arrange the elements in order of increasing atomic mass so that isotopic variations govern chemical reactivity.
   • B) Group the elements according to total nucleon count because nuclear binding energy determines outer valence interactions.
   • C) Sort the elements by decreasing neutron number to ensure that valence electron counts remain identical across each horizontal row.
   • D) Arrange the elements in order of increasing atomic number so that elements with similar properties recur at regular intervals.