#Set name of element plus#

Native metals – Metals that occur pure in nature, including the noble metals and others such as Sn and Pb.

Minor actinides – Actinides found in significant quantities in nuclear fuel, other than U and Pu: Np, Am, Cm.

Heavy atom – term used in computational chemistry to refer to any element other than hydrogen and helium.

Heavy metals – Variously-defined group of metals, on the base of their density, atomic number, or toxicity.

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.

Coinage metals – Various metals used to mint coins, primarily the group 11 elements Cu, Ag, and Au.

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

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. Many other names for sets of elements are in common use, and yet others have been used throughout history.

Lanthanoids and actinoids are sometimes referred to as lanthanides and actinides respectively.

Transition elements are sometimes referred to as transition metals.

Very often these categories are marked by a background color in the periodic table. There is no general agreement on the name to use for these sets.

Main group elements – Elements in groups 1–2 or 13–18, sometimes excluding hydrogen.Īnother common classification is by degree of metallic – metalloidal – nonmetallic behaviour and characteristics.

Inner transition elements – f-block elements.

#Set name of element plus#

Rare-earth metals – Sc, Y, plus the lanthanides.

Actinides – Elements 89–103: Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lr.Lanthanides – Elements 57–71: La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu.(Og had not yet been named when the 2005 IUPAC Red Book was published, and its chemical properties are not yet experimentally known.) Noble gases – The elements of group 18: He, Ne, Ar, Kr, Xe, Rn.(Ts had not yet been named when the 2005 IUPAC Red Book was published, and its chemical properties are not yet experimentally known.) Halogens – The elements of group 17: F, Cl, Br, I, At.(Lv had not yet been named when the 2005 IUPAC Red Book was published, and its chemical properties are not yet experimentally known.) Chalcogens – The elements of group 16: O, S, Se, Te, Po.(Mc had not yet been named when the 2005 IUPAC Red Book was published, and its chemical properties are not yet experimentally known.) Pnictogens – The elements of group 15: N, P, As, Sb, Bi.Transition elements – Elements in groups 3 to 11 or 3 to 12 (the latter equalling the d-block).Alkaline earth metals – The metals of group 2: Be, Mg, Ca, Sr, Ba, Ra.Alkali metals – The metals of group 1: Li, Na, K, Rb, Cs, Fr.The following collective names are recommended by IUPAC:

Many of these sets are formally recognized by the standards body IUPAC.

Amongst this diversity, scientists have found it useful to use names for various sets of elements, that illustrate similar properties, or their trends of properties. There are currently 118 known chemical elements exhibiting many different physical and chemical properties.