MCQ
Which of the following has maximum first ionisation energy ?
- ✓$Pd$ (atomic no. $= 46$)
- B$Ag$ (atomic no. $= 47$)
- C$Rb$ (atomic no. $= 37$)
- D$Y$ (atomic no. $= 39$)
$\mathrm{Ag}(47):[\mathrm{Kr}] \,5 \mathrm{s}^{1} 4 \mathrm{d}^{10}$
$\mathrm{Rb}(37):|\mathrm{Kr}| \,5 \mathrm{s}^{1}$
$\mathrm{Y}(39):[\mathrm{Kr}] \,5 \mathrm{s}^{2} 4 \mathrm{d}^{1}$
removal of electron is most. difficult from $d^{10}$.
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$(a)$ It has rotten egg like small
$(b)$ In aquous solution and presence of light it yields white phosphorous and hydrogen
$(c)$ It explodes with $Br_2$
$(d)$ In pure form it is non inflammable