The edge length of sodium chloride unit cell is 564 pm. If the size of `Cl^-` ion is 181 pm. The size of `Na^+` ion will be
The edge length of sodium chloride unit cell is 564 pm. If the size of `Cl^-` ion is 181 pm. The size of `Na^+` ion will be
A. 101 pm
B. 181 pm
C. 410 pm
D. 202 pm
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Correct Answer - A
`2(r_(+) + r_(-))=a`
`2(r_(Na^+)+ r_(Cl^-))`=564 pm
`r_(Na^+)=564/2-181`=101 pm
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