Carbon group

Carbon group (group 14)
Name by element	carbon group
Trivial name	tetrels
CAS group number; (US, pattern A-B-A)	IVA
old IUPAC number; (Europe, pattern A-B)	IVB

↓ Period

2

Carbon (C)
6 Other nonmetal

3

Silicon (Si)
14 Metalloid

4

Germanium (Ge)
32 Metalloid

5

Tin (Sn)
50 Other metal

6

Lead (Pb)
82 Other metal

7

Flerovium (Fl)
114 Other metal

Legend

primordial element

synthetic element

The carbon group is a periodic table group consisting of carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl). It lies within the p-block.

In modern IUPAC notation, it is called group 14. In the field of semiconductor physics, it is still universally called group IV. The group is also known as the tetrels (from the Greek word tetra, which means four), stemming from the Roman numeral IV in the group name, or (not coincidentally) from the fact that these elements have four valence electrons (see below). They are also known as the crystallogens^[1] or adamantogens.^[2]

^ Liu, Ning; Lu, Na; Su, Yan; Wang, Pu; Quan, Xie (2019). "Fabrication of g-C₃N₄/Ti₃C₂ composite and its visible-light photocatalytic capability for ciprofloxacin degradation". Separation and Purification Technology. 211: 782–789. doi:10.1016/j.seppur.2018.10.027. Retrieved 17 August 2019.
^ W. B. Jensen, The Periodic Law and Table Archived 2020-11-10 at the Wayback Machine.

[crystal-1] Liu, Ning; Lu, Na; Su, Yan; Wang, Pu; Quan, Xie (2019). "Fabrication of g-C₃N₄/Ti₃C₂ composite and its visible-light photocatalytic capability for ciprofloxacin degradation". Separation and Purification Technology. 211: 782–789. doi:10.1016/j.seppur.2018.10.027. Retrieved 17 August 2019.

[2] W. B. Jensen, The Periodic Law and Table Archived 2020-11-10 at the Wayback Machine.

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