Group 6 element

Group 6 in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
group 5 ←    → group 7
IUPAC group number 6
Name by element chromium group
CAS group number
(US, pattern A-B-A)
 VIB
old IUPAC number
(Europe, pattern A-B)
 VIA
↓ Period
4
Image: Chromium crystal bar
Chromium (Cr)
24 Transition metal
5
Image: Molybdenum crystal bar
Molybdenum (Mo)
42 Transition metal
6
Image: Tungsten crystal bar
Tungsten (W)
74 Transition metal
7 Seaborgium (Sg)
106 Transition metal

Legend

primordial element
synthetic element

Group 6, numbered by IUPAC style, is a group of elements in the periodic table. Its members are chromium (Cr), molybdenum (Mo), tungsten (W), and seaborgium (Sg). These are all transition metals and chromium, molybdenum and tungsten are refractory metals.

The electron configuration of these elements do not follow a unified trend, though the outermost shells do correlate with trends in chemical behavior:

Z Element No. of electrons/shell
24 chromium 2, 8, 13, 1
42 molybdenum 2, 8, 18, 13, 1
74 tungsten 2, 8, 18, 32, 12, 2
106 seaborgium 2, 8, 18, 32, 32, 12, 2

"Group 6" is the new IUPAC name for this group; the old style name was "group VIB" in the old US system (CAS) or "group VIA" in the European system (old IUPAC). Group 6 must not be confused with the group with the old-style group crossed names of either VIA (US system, CAS) or VIB (European system, old IUPAC). That group is now called group 16.