The name pnictogens is also sometimes used for this group; it is not approved by IUPAC. The spelling pnicogen is also recorded. Both spellings derive from the Greekπνίγειν (pnigein), to choke or stifle, which is a property of nitrogen.
This group has the defining characteristic that all the component elements have 5 electrons in their outermost shell, that is 2 electrons in the s subsshell and 3 in the p subshell.
Any of the elements in Group O of the periodic table, including helium, neon, argon, krypton, xenon, and radon, which are monatomic and with limited exceptions chemically inert.
A Group 6 element is the series of elements in group 6 (IUPAC style) in the periodic table, which consists of the transition metals chromium (Cr), molybdenum (Mo), tungsten (W), and seaborgium (Sg).
"Group 6" is the new IUPAC name for this group, the old style name was "group VIA" in the old European system or "group VIB" in the old US system.
Group 6 must not be confused with the group with the old-style group names of either VIB (European system) or VIA (US system) which is now group 16.
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