The size of the isoelectronic species Cl, Ar and Ca is affected by:

Question

Canvas Classes · Accepted Answer

Strategy:
 Isoelectronic species share the same number of electrons. Consequently, their physical dimensions are regulated solely by the nuclear charge () of the atom.

Step 1: Tally electrons and protons
- :  electrons,  protons.
- :  electrons,  protons.
- :  electrons,  protons.

Step 2: Analyze size
With the same electron cloud, the species with the highest nuclear charge pulled the cloud tightest.
Order: .

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