Question 82

Which one the following sets of ions represents the collection of isoelectronic species?

Name: Which one the following sets of ions represents the collection of isoelectronic species?
Uploaded: 2026-06-25T15:24:32.788419+05:30
Duration: 2 min 44 s
Description: Which one the following sets of ions represents the collection of isoelectronic species?

Solution

Isoelectronic species are atoms, molecules, or ions that have the same number of electrons.

A: $$K^+$$ (18e⁻), $$Ca^{2+}$$ (18e⁻), $$Sc^{3+}$$ (18e⁻), $$Cl^-$$ (18e⁻)

B: $$Na^+$$ (10e⁻), $$Mg^{2+}$$ (10e⁻), $$Al^{3+}$$ (10e⁻), but $$Cl^-$$ has 18e⁻.

C: $$K^+$$ (18e⁻), $$Cl^-$$ (18e⁻), $$Sc^{3+}$$ (18e⁻), but $$Mg^{2+}$$ has 10e⁻.

D: $$Na^+$$ (10e⁻), $$F^-$$ (10e⁻), but $$Ca^{2+}$$ and $$Sc^{3+}$$ both have 18e⁻.
Hence,
A: $$K^+, Ca^{2+}, Sc^{3+}, Cl^-$$.

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