Question
$\mathrm{O}^{2-}, \mathrm{F}, \mathrm{Na}^{+}, \mathrm{Al}^{3+}$ are isoelectronic ions. Their ionic sizes follow the order:(a) $\mathrm{O}^{2-}>\mathrm{F}>\mathrm{Na}^{+}>\mathrm{Al}^{3+}$(b) $\mathrm{O}^{2-}<\mathrm{F} \quad<\mathrm{Na}^{+}<\mathrm{Al}^{3+}$(c) $\mathrm{Al}^{3+}>\mathrm{O}^{2-}>\mathrm{Na}^{+}>\mathrm{F}$(d) $\mathrm{Na}^{+}<\mathrm{Al}^{3+}<\mathrm{O}^{2-}<\mathrm{F}$
Step 1
Isoelectronic ions are ions that have the same number of electrons. In this case, $\mathrm{O}^{2-}, \mathrm{F}, \mathrm{Na}^{+}, \mathrm{Al}^{3+}$ are all isoelectronic because they all have 10 electrons. Show more…
Show all steps
Your feedback will help us improve your experience
Narayan Hari and 101 other educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Consider the isoelectronic ions: $K^{+}, S^{2}, C 1$ and $C a^{2 t}$. The radii of these ionic species follow the order (a) $\mathrm{Ca}^{2 *}>\mathrm{K}+>\mathrm{Cl}>\mathrm{S}^{2-}$ (b) $\mathrm{Cl}>\mathrm{S}^{2-}>\mathrm{K}^{+}>\mathrm{Ca}^{2+}$ (c) $\mathrm{S}^{2-}>\mathrm{Cl}>\mathrm{K}^{*}>\mathrm{Ca}^{2+}$ (d) $\mathrm{K}^{+}>\mathrm{Ca}^{2+}>\mathrm{S}^{2-}>\mathrm{Cl}^{-}$
The correct order of the ionic radii of $\mathrm{O}^{2-}, \mathrm{N}^{3-}, \mathrm{F}^{-}, \mathrm{Mg}^{2+}, \mathrm{Na}^{+}$and $\mathrm{Al}^{3+}$ is : (a) $\mathrm{N}^{3-}<\mathrm{O}^{2-}<\mathrm{F}^{-}<\mathrm{Na}^{+}<\mathrm{Mg}^{2+}<\mathrm{Al}^{3+}$ (b) $\mathrm{Al}^{3+}<\mathrm{Na}^{+}<\mathrm{Mg}^{2+}<\mathrm{O}^{2-}<\mathrm{F}^{-}<\mathrm{N}^{3-}$ (c) $\mathrm{Al}^{3+}<\mathrm{Mg}^{2+}<\mathrm{Na}^{+}<\mathrm{F}^{-}<\mathrm{O}^{2-}<\mathrm{N}^{3-}$ (d) $\mathrm{N}^{3-}<\mathrm{F}^{-}<\mathrm{O}^{2-}<\mathrm{Mg}^{2+}<\mathrm{Na}^{+}<\mathrm{Al}^{3+}$
Classification of Elements and Periodicity in Properties
Topic 2 : Periodic Properties
The ionic radii of $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}$and $\mathrm{Mg}^{2+}$ are in the order: (a) $\mathrm{F}^{-}>\mathrm{O}^{2-}>\mathrm{Na}^{+}>\mathrm{Mg}^{2+}$ (b) $\mathrm{O}^{2-}>\mathrm{F}^{-}>\mathrm{Na}^{+}>\mathrm{Mg}^{2+}$ (c) $\mathrm{Mg}^{2+}>\mathrm{Na}^{+}>\mathrm{F}^{-}>\mathrm{O}^{2-}$ (d) $\mathrm{O}^{2-}>\mathrm{F}^{-}>\mathrm{Mg}^{2+}>\mathrm{Na}^{+}$
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD