The number of element from the following that do not belong to lanthanoids is
Eu, Cm, Er, Tb, Yb and Lu [2024]
5
1
3
4
(2)
Lanthanoid series elements are
La57(Lanthanum), 58Ce(Cerium), 59Pr(Praseodymium), 60Nd(Neodymium), 61Pm(Promethium), Sm62(Samarium),
63Eu(Europium), 64Gd(Gadolinium), 65Tb(Terbium), 66Dy(Dysprosium), Ho67(Holmium), 68Er(Erbium),
69Tm(Thulium), 70Yb(Ytterbium), and 71Lu(Lutetium).
Cm96(Curium) is an actinoid.
