Discussion Overview
The discussion revolves around determining the order of increasing radius for the ions Ar, K+, and Ca2+. Participants explore concepts related to effective nuclear charge, nuclear charge, and the nature of the species being compared.
Discussion Character
Main Points Raised
- One participant suggests that the order of increasing radius is influenced by effective nuclear charge, proposing that Ar+2+ based on this concept.
- Another participant argues that effective nuclear charge is unnecessary for this comparison and recommends using actual nuclear charge (atomic number) instead, implying that a higher nuclear charge results in a tighter binding of electrons.
- A later reply reiterates the point about using actual nuclear charge and suggests a different order, proposing C as the answer.
- One participant confirms the correctness of the last response without elaboration.
Areas of Agreement / Disagreement
Participants express differing views on the relevance of effective nuclear charge versus actual nuclear charge, indicating that there is no consensus on the best approach to determine the order of increasing radius.
Contextual Notes
Participants discuss whether to consider the noble gas and the metal ions as single atomic species or diatomic, raising questions about the appropriate radii to compare (metallic radius, Van der Waals radius, or ionic radius).
