NTA Abhyas 2020
- Exam
- NTA Abhyas
- Year
- 2020
- Subject
- Chemistry
- Chapter
- Classification of Elements and Periodicity in Properties
NTA Abhyas 2020 · Chemistry · Classification of Elements and Periodicity in Properties
The set representing the correct order of ionic radii is
The set representing the correct order of ionic radii is
Options
- A{\text{Li}^{+} \text{>}{\text{Be}^{\text{2+}} \text{>}{\text{Na}^{+} \text{>}{\text{Mg}^{\text{2+}}
- B{\text{Li}^{+} \text{>}{\text{Na}^{+} \text{>}{\text{Mg}^{\text{2+}} \text{>}{\text{Be}^{\text{2+}}
- C{\text{Mg}^{\text{2+}} \text{>}{\text{Be}^{\text{2+}} \text{>}{\text{Li}^{+} \text{>}{\text{Na}^{+}
- D{\text{Na}^{+} \text{> }{\text{Li}^{+} \text{> }{\text{Mg}^{\text{2+}} \text{> }{\text{Be}^{\text{2+}}
Correct answer
D. {\text{Na}^{+} \text{> }{\text{Li}^{+} \text{> }{\text{Mg}^{\text{2+}} \text{> }{\text{Be}^{\text{2+}}
Step-by-step solution
charge cation is smaller in size than charge cation due to more effective nuclear charge.
{\text{Na}^{+} \text{> }{\text{Li}^{+} (down the group)
{\text{Mg}^{\text{2+}} \text{> }{\text{Be}^{\text{2+}} (down the group)
{\text{Na}^{+} \text{> }{\text{Li}^{+} (down the group)
{\text{Mg}^{\text{2+}} \text{> }{\text{Be}^{\text{2+}} (down the group)