Category

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  • This section has been deprecated; due to the bewildering variety of slightly different categories in the literature and disagreement on their boundaries, a strict scheme based on blocks has been adopted as of January 2021.
  • Note: as of 17 August 2013, the English wikipedia has changed categorisation and background colors of nonmetal elements. Below is the new categorisation scheme. Differences are about these old categories: "other nonmetal", "halogen", "post-transition metals"

Nonmetals are subdevided in diatomic nonmetals, polyatomic nonmetals (and noble gases, unchanged). The category other/poor metals is renamed into post-transition metals without further changes. This is the new scheme:

Metal Metalloid
#cccc99
Nonmetal unknown chemical properties
#e8e8e8
[note 1]
Alkali metal
#ff9d9d
Alkaline earth metal
#ffdead
Inner transition metal Transition metal
#ffc0c0
post-​transition metal
#cccccc
Polyatomic nonmetal
#a1ffc3
Diatomic nonmetal
#e7ff8f
Noble gas
#c0ffff
Lanthanide
#ffbfff
Actinide
#ff99cc
Superactinide [note 2] Eka-​superactinide [note 2]
predicted
#d8bcbc
predicted
#ffecd3
[note 2] [note 2] predicted
#d1ddff
predicted
#c6dd9d
predicted
#ffe2e2
predicted
#d8d8d8
predicted
#e2e2aa
predicted
#d0ffe1
predicted
#f2ffc2
predicted
#ddffff
  1. ^ Unknown chemical properties (grey) may be used instead of predicted
  2. ^ a b c d Situation does not arise

Usage

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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
Ununennium Unbinilium
Unquadtrium Unquadquadium Unquadpentium Unquadhexium Unquadseptium Unquadoctium Unquadennium Unpentnilium Unpentunium Unpentbium Unpenttrium Unpentquadium Unpentpentium Unpenthexium Unpentseptium Unpentoctium Unpentennium Unhexnilium Unhexunium Unhexbium Unhextrium Unhexquadium Unhexpentium Unhexhexium Unhexseptium Unhexoctium Unhexennium Unseptnilium Unseptunium Unseptbium
Unbiunium Unbibium Unbitrium Unbiquadium Unbipentium Unbihexium Unbiseptium Unbioctium Unbiennium Untrinilium Untriunium Untribium Untritrium Untriquadium Untripentium Untrihexium Untriseptium Untrioctium Untriennium Unquadnilium Unquadunium Unquadbium

Earlier category scheme

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Earlier categorisation & color scheme for the English wikipedia (before 17 August 2013)
Metal Metalloid
#cccc99
Nonmetal unknown chemical properties
#e8e8e8
[oldnote 1]
Alkali metal
#ff9d9d
Alkaline earth metal
#ffdead
Inner transition metal Transition metal
#ffc0c0
Post-​transition metal
#cccccc
 N
Other Nonmetal
#a0ffa0
 N

Halogen
#ffff99
Noble gas
#c0ffff
Lanthanide
#ffbfff
Actinide
#ff99cc
Superactinide [oldnote 2] Eka-​superactinide [oldnote 2]
predicted
#d8bcbc
predicted
#ffecd3
[oldnote 2] [oldnote 2] predicted
#d1ddff
predicted
#c6dd9d
predicted
#ffe2e2
predicted
#d8d8d8
predicted
#e2e2aa
predicted
#D3ffd3
predicted
#ffffff
predicted
#ddffff
  1. ^ Unknown chemical properties (grey) may be used instead of predicted
  2. ^ a b c d Situation does not arise

Categories, reduced set

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When a reduced category set, or more general category set, is used, below are their color legends. It is unadvised to use different category levels (different legend rows) in a single table.

Metal
#eee8aa
Metalloid
#cccc99
Nonmetal
#b0e0e6
unknown chemical properties
#e8e8e8
[note 1]
Alkali metal
#ff9d9d
Alkaline earth metal
#ffdead
Inner transition metal
#d8bfd8
Transition metal
#ffc0c0
post-transition metal
#cccccc
Polyatomic nonmetal
#a1ffc3
Diatomic nonmetal
#e7ff8f
Noble gas
#c0ffff
  1. ^ Unknown chemical properties (grey) may be used instead of predicted

(As of December 2012)