Names for sets of chemical elements

Short description: Group of chemical elements

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Part of a series on the

Periodic table

Periodic table forms

* 18-column

* 32-column

* Alternative forms

* Janet's left step

* Beyond period 7

* Aufbau
* Fricke
* Pyykkö

Periodic table history

* Dmitri Mendeleev
* predictions

* Discovery of elements

* Naming & etymology

*     * for places
* for people
* controversies

* (in East Asia)

* Systematic element names

Sets of elements

By periodic table structure

* Groups (1–18)

* 1 (Li, Na, K, Rb, Cs, Fr — lithium family, s¹ metals" class="nowrap">alkali metals)
* Be, Mg, Ca, Sr, Ba, Ra — beryllium group, s² metals" class="nowrap">2 (alkaline earth metals)
* Sc, Y… — scandium group, s² d¹ metals">3
* Ti, Zr, Hf, Rf — titanium and analogs, transition metals with 4 valence electrons">4
* V, Nb, Ta, Db — vanadium and analogs, transition metals with 5 valence electrons">5
* Cr, Mo, W, Sg — chromium and analogs, transition metals with 6 valence electrons">6
* Mn, Tc, Re, Bh — manganese and analogs, transition metals with 7 valence electrons">7
* Fe, Ru, Os, Hs — iron and analogs, transition metals with 8 valence electrons">8
* Co, Rh, Ir, Mt — cobalt and analogs, transition metals with 9 valence electrons">9
* Ni, Pd, Pt, Ds — nickel and analogs, transition metals with 10 valence electrons">10
* Cu, Ag, Au, Rg — coinage metals, transition metals with 11 valence electrons">11
* Zn, Cd, Hg, Cn — zinc group, s² d¹⁰ metals">12
* B, Al, Ga, In, Tl, Nh — boron group, s² p¹ elements">13
* C, Si, Ge, Sn, Pb, Fl — carbon group, s² p² elements">14
* N, P, As, Sb, Bi, Mc — nitrogen group, s² p³ elements" class="nowrap">15 (pnictogens)
* O, S, Se, Te, Po, Lv — oxygen group, s² p⁴ elements" class="nowrap">16 (chalcogens)
* F, Cl, Br, I, At, Ts — fluorine group, s² p⁵ elements" class="nowrap">17 (halogens)
* He, Ne, Ar, Kr, Xe, Rn, Og — elements having a complete valence shell" class="nowrap">18 (noble gases)

* Periods (1–7, ...)

* H, He, Z = 1–2">1
* Li … Ne, Z = 3–10">2
* Na … Ar, Z = 11–18">3
* K … Kr, Z = 19–36">4
* Rb … Xe, Z = 37–54">5
* Cs … Rn, Z = 55–86">6
* Fr … Og, Z = 87–118">7

* 8+
* Aufbau
* Fricke
* Pyykkö

* Blocks (s, p, d, f, ...)

*     * Atomic orbitals
* Aufbau principle

By metallic classification

* Metals

* alkali
* alkaline earth

* transition
* post-transition

* lanthanide
* actinide (superactinide)

* Metalloids

*     * dividing metals & nonmetals

* Nonmetals

* reactive nonmetals
* noble gases

By other characteristics

* Coinage metals
* Platinum-group metals

* Precious metals
* Refractory metals

* Heavy metals
* Light metals

* Native metals
* Noble metals

* Main-group elements
* Rare-earth elements

* Transuranium, transplutonium elements

* Major, minor & trans- actinides

Elements

List of chemical elements

* by abundance (in human body)

* by atomic properties
* by isotope stability

* by annual production
* by symbol

Properties of elements

* Atomic weight
* Crystal structure

* Electron affinity
* configuration

* Electronegativity (Allen, Electronegativity#Pauling_electronegativity

Data pages for elements

* Abundance
* Atomic radius
* Boiling point
* Critical point
* Density
* Elasticity
* Electrical resistivity
* Electron affinity / configuration
* Electronegativity
* Hardness
* Heat capacity / of fusion / of vaporization
* Ionization energy
* Melting point
* Oxidation state
* Speed of sound
* Thermal conductivity / expansion coefficient
* Vapor pressure

* Book
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* Chemistry Portal

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There are currently 118 known chemical elements with a wide range of physical and chemical properties. Amongst this diversity, scientists have found it useful to apply names for various sets of elements that have similar properties, to varying degrees. Many of these sets are formally recognized by the standards body IUPAC.[1]

## Contents

* 1 IUPAC
* 2 Metallicity-based
* 3 Common and historical
* 4 References
* 5 External links

## IUPAC

The following collective names are recommended or noted by IUPAC:

Alkali metals | The metals of group 1: Li, Na, K, Rb, Cs, Fr

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Alkaline earth metals | The metals of group 2: Be, Mg, Ca, Sr, Ba, Ra
Transition elements * | Elements in groups 3 to 11 or 3 to 12 (the latter making up the d-block)
Pnictogens | The elements of group 15: N, P, As, Sb, Bi †
Chalcogens | The elements of group 16: O, S, Se, Te, Po †
Halogens | The elements of group 17: F, Cl, Br, I, At †
Noble gases | The elements of group 18: He, Ne, Ar, Kr, Xe, Rn †
Lanthanoids ‡ | Elements 57–71: La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu
Actinoids ‡ | Elements 89–103: Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lr
Rare-earth metals | Sc, Y, plus the lanthanides
Inner transition elements | f-block elements
Main group elements | Elements in groups 1–2 or 13–18, excluding hydrogen

* Transition elements are sometimes referred to as transition metals
† Although the heavier elements of groups 15 (Mc), 16 (Lv), 17 (Ts) and 18 (Og) have been notionally assigned to the indicated groups their chemical properties have not yet been experimentally confirmed.
‡ Lanthanoids and actinoids are sometimes referred to as lanthanides and actinides respectively

## Metallicity-based

Another common classification is by degree of metallic or nonmetallic behaviour and characteristics. Elements in the vicinity of where the metals and nonmetals meet are sometime classified as metalloids or an equivalent term. These two to three classes are commonly marked by differing background colors in the periodic table.

## Common and historical

Many other names for sets of elements are in common use; others have been used throughout history. These sets usually do not aim to cover the whole periodic table (as for example period does), and often overlap or have boundaries that differ between authors. Some examples:

* Metals and nonmetals
* Metalloids – Variously-defined group of elements with properties intermediate between metals and nonmetals.

In alphabetic order:

* Coinage metals – Various metals used to mint coins, primarily the group 11 elements Cu, Ag, and Au.
* Earth metal – Old historic term, usually referred to the metals of groups 3 and 13, although sometimes others such as beryllium and chromium are included as well.
* Heavy metals – Variously-defined group of metals, on the base of their density, atomic number, or toxicity.
* Heavy atom – term used in computational chemistry to refer to any element other than hydrogen and helium.
* Minor actinides – Actinides found in significant quantities in nuclear fuel, other than U and Pu: Np, Am, Cm.
* Native metals – Metals that occur pure in nature, including the noble metals and others such as Sn and Pb.
* Noble metals – Variously-defined group of metals that are generally resistant to corrosion. Usually includes Ag, Au, and the platinum-group metals.
* Non-ferrous metals - Metals or alloys that do not contain iron in appreciable amounts.
* Platinum group – Ru, Rh, Pd, Os, Ir, Pt.
* Post-transition metals – The metals coming after the transition metals. Many other names have been used for this set, and its borders are not agreed on.
* Precious metals – Variously-defined group of non-radioactive metals of high economical value.
* Superactinides – Hypothetical series of elements 121 to 157, which includes a predicted "g-block" of the periodic table.
* Transactinide elements – Elements after the actinides (atomic number greater than 103).
* Transplutonium elements – Elements with atomic number greater than 94.
* Transuranium elements – Elements with atomic number greater than 92.
* Valve metal - a metal which, in an electrolytic cell, passes current in only one direction.

## References

1. ↑ International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSC–IUPAC. ISBN 0-85404-438-8. Electronic version. Retrieved 10 June 2012.

## External links

* v
* t
* e

Periodic table

Periodic table forms|

| Standard|

* 18-column
* 32-column

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Alternative|

* Alternatives
* Janet's left step table

Extended|

* Extension beyond the 7th period
* Aufbau
* Fricke
* Pyykkö

Sets of elements|

| By periodic table structure|

| Groups|

* 1 (Alkali metals)
* 2 (Alkaline earth metals)
* 3
* 4
* 5
* 6
* 7
* 8
* 9
* 10
* 11
* 12
* 13
* 14
* 15 (Pnictogens)
* 16 (Chalcogens)
* 17 (Halogens)
* 18 (Noble gases)

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Periods|

* 1
* 2
* 3
* 4
* 5
* 6
* 7
* 8+
* Aufbau
* Fricke
* Pyykkö

Blocks|

* s-block
* p-block
* d-block
* f-block
* g-block
* Aufbau principle

By metallicity|

| Metals|

* Alkali metals
* Alkaline earth metals
* Lanthanides
* Actinides
* Transition metals
* Post-transition metals

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Metalloids|

* Lists of metalloids by source
* Dividing line

Nonmetals|

* Reactive nonmetals
* Noble gases

Other sets|

* Platinum-group metals (PGM)
* Rare-earth elements
* Refractory metals
* Precious metals
* Coinage metals
* Noble metal
* Heavy metals
* Native metals
* Transuranium elements
* Superheavy elements
* Major actinides
* Minor actinides

Elements|

| Lists|

* By: Abundance (in humans)
* Atomic properties
* Nuclear stability
* Production
* Symbol

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Properties|

* Crystal structure
* Electron configuration
* Electronegativity
* Goldschmidt classification
* Term symbol

Data pages|

* Abundance
* Atomic radius
* Boiling point
* Critical point
* Density
* Elasticity
* Electrical resistivity
* Electron affinity
* Electron configuration
* Electronegativity
* Hardness
* Heat capacity
* Heat of fusion
* Heat of vaporization
* Ionization energy
* Melting point
* Oxidation state
* Speed of sound
* Thermal conductivity
* Thermal expansion coefficient
* Vapor pressure

History|

* Element discoveries
* Mendeleev's predictions
* Naming
* etymology
* controversies
* for places
* for people
* in East Asia

See also|

* IUPAC
* nomenclature
* systematic element name
* Trivial name
* Dmitri Mendeleev

* Book
* Category

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