MCQ
Atomic radius of $Be, O, C, N, B$ are respectively (in $pm$)
- A$74, 88, 111, 77, 66$
- B$111, 88, 77, 74, 66$
- ✓$111, 66, 77, 74, 88$
- D$111, 66, 88, 77, 74$
✓
Answer
Correct option: C.
$111, 66, 77, 74, 88$
c
period $\mathrm{L}$ to $\mathrm{R}$ Zeff $\uparrow \uparrow$ $A.$ $\mathrm{R} \downarrow \downarrow$
period $\mathrm{L}$ to $\mathrm{R}$ Zeff $\uparrow \uparrow$ $A.$ $\mathrm{R} \downarrow \downarrow$
$\mathrm{Be}>\mathrm{B}>\mathrm{C}>\mathrm{N}>\mathrm{O}$
$\rightarrow 111\,\,\,\,\,88\,\,\,\,\,77\,\,\,\,\,74\,\,\,\,\,66$
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