Among the following elements how many of them are inner transition elements ?
(a) `Sg` , (b) `Bk`, (c ) `Er` , (d) `Em`
(e) `Fe` , (f) `Pb` , (g) `Cr` , (h) `Ca`
(i) `Ar` , (j) `Zr` , (k) `Ce`

Among the following elements how many of them are inner transition elements ? (a) Sg , (b) Bk , (c ) Er , (d) Fm (e) Fe , (f) Pb , (g) Cr , (h) Ca (i) Ar , (j) Zr , (k) Ce

Which of the following elements are transition elements ? Ni, Ar, Ca, Fe, Cr, Pb

Among the following oxides how many of them are suboxides ? (a) C_(3)O_(2) , (b) N_(2)O , (c ) NO_(2) , (d) CO (e) Fe_(3)O_(4) , (f) KO_(2)

Among the following oxides how many of them are suboxides ? (a) C_(3)O_(2) , (b) N_(2)O , (c ) NO_(2) , (d) CO (e) Fe_(3)O_(4) , (f) KO_(2)

Among the following oxides how many of them are mixed oxides ? (a) H_(2)O , (b) C_(3)O_(2) , (c ) Fe_(3)O_(4) , (d) Fe_(2)O_(3) (e) Pb_(3)O_(4) , (f) PbO_(2) , (g) Co(AlO_(2))_(2) , (h) Mn_(3)O_(4)