टेम्पलेट:Periodic table (group names)

Groups in the Periodic table

IUPAC group		1	2	3		4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Mendeleev (I–VIII)		IA	IIA	IIIB		IVB	VB	VIB	VIIB	VIIIB			IB	IIB	IIIB	IVB	VB	VIB	VIIB
CAS (US, A-B-A)		IA	IIA	IIIB		IVB	VB	VIB	VIIB	VIIIB			IB	IIB	IIIA	IVA	VA	VIA	VIIA	VIIIA
old IUPAC (Europe, A-B)		IA	IIA	IIIA		IVA	VA	VIA	VIIA	VIIIB			IB	IIB	IIIB	IVB	VB	VIB	VIIB	0
Trivial name		Alkali metals	Alkaline earth metals										Coin­age metals		Triels	Tetrels	Pnicto­gens	Chal­co­gens	Halo­gens	Noble gases
Name by element		Lith­ium group	Beryl­lium group	Scan­dium group		Titan­ium group	Vana­dium group	Chro­mium group	Man­ga­nese group	Iron group	Co­balt group	Nickel group	Cop­per group	Zinc group	Boron group	Car­bon group	Nitro­gen group	Oxy­gen group	Fluor­ine group	Helium or Neon group
Period 1		h H h																		He
Period 2		Li	Be												B	C	N	O	F	Ne
Period 3		Na	Mg												Al	Si	P	S	Cl	Ar
Period 4		K	Ca	Sc		Ti	V	Cr	Mn	Fe	Co	Ni	Cu	Zn	Ga	Ge	As	Se	Br	Kr
Period 5		Rb	Sr	Y		Zr	Nb	Mo	Tc	Ru	Rh	Pd	Ag	Cd	In	Sn	Sb	Te	I	Xe
Period 6		Cs	Ba	La	Ce–Lu	Hf	Ta	W	Re	Os	Ir	Pt	Au	Hg	Tl	Pb	Bi	Po	At	Rn
Period 7		Fr	Ra	Ac	Th–Lr	Rf	Db	Sg	Bh	Hs	Mt	Ds	Rg	Cn	Nh	Fl	Mc	Lv	Ts	Og

^a Group 3 has scandium (Sc) and yttrium (Y). For the rest of the group, sources differ as either being (1) lutetium (Lu) and lawrencium (Lr), or (2) lanthanum (La) and actinium (Ac), or (3) the whole set of 15+15 lanthanides and actinides. IUPAC has initiated a project to standardize the definition as either (1) Sc, Y, Lu and Lr, or (2) Sc, Y, La and Ac.
^b Group 18, the noble gases, were not discovered at the time of Mendeleev's original table. Later (1902), Mendeleev accepted the evidence for their existence, and they could be placed in a new "group 0", consistently and without breaking the periodic table principle.
^r Group name as recommended by IUPAC.
^h Hydrogen (H), while placed in group 1, is not considered to be part of the alkali metals.

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