The d & f Block Elements — Chemistry STD 12 Science — Question

 

 

(i)

Lanthanoid which shows $+4$ oxidation state

$(a)$

$Pm$

(ii)

Lanthanoid which can show $+2$ oxidation state

$(b)$

$Ce$

(iii)

Radioactive lanthanoid

$(c)$

$Lu$

(iv)

Lanthanoid which has $4f^7$ electronic configuration in +3 oxidation state

$(d)$

$Eu$

(v)

Lanthanoid which has $4f^{14}$ electronic configuration in +3 oxidation state

$(e)$

$Gd$

 

 

$(f)$

$Dy$