Group 3 element Did You Mean Group?

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Group	3
Period
4	21 Sc
5	39 Y

Lanthanides
57 La	58 Ce	59 Pr	60 Nd
61 Pm	62 Sm	63 Eu	64 Gd
65 Tb	66 Dy	67 Ho	68 Er
69 Tm	70 Yb	71 Lu
Actinides
89 Ac	90 Th	91 Pa	92 U
93 Np	94 Pu	95 Am	96 Cm
97 Bk	98 Cf	99 Es	100 Fm
101 Md	102 No	103 Lr

A Group 3 element is the series of elements in group 3 (IUPAC style) of the periodic table, which consists of

the transition metals scandium (Sc) and yttrium (Y)
the Lanthanide Series elements, lanthanum (La), Cerium (Ce), Praseodymium (Pr), Neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), Holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb) and lutetium (Lu) and
the Actinides Series elements actinium (Ac), thorium (Th), protactinium (Pa), uranium (U), neptunium (Np), plutonium (Pu), americium (Am), Curium (Cm), Berkelium (Bk), californium (Cf), einsteinium (Es), fermium (Fm), mendelevium (Md), nobelium (No), and lawrencium (Lr).

All of these elements are classed in Group 3 because their outer shell holds three electrons. Scandium, yttrium, and the lanthanides (except promethium) can all be found naturally, albeit at very low levels in the Earth's crust, and are collectively called rare-earth metals. Promethium, actinium, protactinium, neptunium, and americium through lawrencium can only be produced in the laboratory and have not been found in nature.

Explanation of above periodic table slice:

Transition metals

Lanthanide Series

Actinides Series

atomic number in black are solids

solid borders are older than the Earth (Primordial elements)

dotted borders are made artificially (Synthetic elements)

Periodic tables