KVPY2013ChemistryClassification of Elements and Periodicity in Properties
The radii of the first Bohr orbit of H ( r _ H ), He ⁺ ( r _ H ⁺ ) and Li ²⁺ ( r _ L ²⁺ ) are in the order
Options
- Ar_ H e ⁺>r_ H >r_ L i ²⁺
- Br_ H < r_ H e ⁺ < r_ L i ²⁺
- Cr_ H >r_ H e ⁺>r_ L i ²⁺
- Dr_ He ⁺ < r _ H < r _ Li ²⁺
Correct answer
C. r_ H >r_ H e ⁺>r_ L i ²⁺
Step-by-step solution
r=0.529 n ² z r 1 z So correct order is r_ H >r_ H e ⁺>r_ L i ²⁺