Short description: List of semi-metallic chemical elements
This is a list of 194 sources that list elements classified as metalloids. The sources are listed in chronological order. Lists of metalloids differ since there is no rigorous widely accepted definition of metalloid (or its occasional alias, 'semi-metal'). Individual lists share common ground, with variations occurring at the margins. The elements most often regarded as metalloids are boron, silicon, germanium, arsenic, antimony and tellurium.[n 1] Other sources may subtract from this list, add a varying number of other elements, or both.
Contents
1Overview
2Chronological list
3Appearance frequency clusters
4Elements regarded as metalloids
5Notes
6References
Overview
Element
Citations
Frequency
in n = 194 publications
194 = 100%
Arsenic
As
191.5
99%
Tellurium
Te
190.5
98%
Germanium
Ge
184.5
95%
Silicon
Si
183.5
95%
Antimony
Sb
169.5
87%
Boron
B
166
86%
Polonium
Po
94.5
49%
Astatine
At
77
40%
Selenium
Se
46
24%
Aluminium
Al
18
9.3%
Carbon
C
16.5
8.5%
Bismuth
Bi
11.5
5.9%
Phosphorus
P
10
5.2%
Beryllium
Be
7.5
3.9%
Tin
Sn
5.5
2.8%
Sulfur
S
3
1.5%
Livermorium
Lv
3
1.5%
Iodine
I
2.5
1.3%
Flerovium
Fl
1
0.5%
Gallium
Ga
1
0.5%
Hydrogen
H
1
0.5%
Lead
Pb
1
0.5%
Moscovium
Mc
1
0.5%
Tennessine
Ts
1
0.5%
Chronological list
This table shows which elements are included in each of 194 different lists of metalloids. A parenthesized symbol indicates an element whose inclusion in a particular metalloid list is qualified in some way by the author(s). The 'citations' rows show how many and what percentage of the authorities consider each element to be a metalloid, with qualified citations counted as one-half.
Citations as metalloid by element
Element
Arsenic
Tellurium
Germanium
Silicon
Antimony
Boron
Polonium
Astatine
Selenium
Aluminium
Carbon
Bismuth
Phosphorus
Beryllium
Tin
Sulfur
Livermorium
Iodine
Other
Count
As
Te
Ge
Si
Sb
B
Po
At
Se
Al
C
Bi
P
Be
Sn
S
Lv
I
avg
Citations (194=100%)
191.5
190.5
184.5
183.5
169.5
166
94.5
77
46
18
16.5
11.5
10
7.5
5.5
3
3
2.5
6
7.15
99%
98%
95%
95%
87%
86%
49%
40%
24%
9.3%
8.5%
5.9%
5.2%
3.9%
2.8%
1.5%
1.5%
1.3%
3.1%
Source
Yr
Simmons[1]
1947
As
Te
Sb
Se
4
Szabó & Lakatos[2]
1954
As
Te
Ge
Si
Sb
B
Po
At
Al
Be
10
Dull, Metcalfe & Williams[3]
1958
As
Te
Ge
Si
Sb
B
Po
At
Al
9
Frey[4]
1958
As
Te
Ge
Si
Sb
B
Po
7
Johnstone & Miller[5]
1960
As
Te
Ge
Si
Sb
B
Se
C
P
9
Edwards et al.[6]
1961
As
Te
Ge
Si
Sb
B
Se
I
8
Bond[7]
1962
As
Te
Ge
Si
Sb
B
Po
7
Swift & Schaefer[8]
1962
As
Ge
Si
Sb
B
Bi
6
Hoffman[9]
1963
As
Te
Ge
Si
Sb
B
Be
7
Nathans[10]
1963
As
Te
Ge
Si
Sb
B
At
7
Bailar, Moeller & Kleinberg[11]
1965
As
Te
Ge
Se
4
Selwood[12]
1965
As
Te
Ge
Si
Sb
B
Po
At
Al
Bi
Sn
Ga
12
Bassett et al.[13]
1966
Te
Ge
Si
Sb
B
Po
Al
Be
8
Hultgren[14]
1966
As
Te
Ge
Si
Sb
Se
C
7
Metcalfe, Williams & Castka[15]
1966
As
Te
Ge
Si
Sb
B
Po
(Al)
7.5
Rochow[16]
1966
As
Te
Ge
Si
Sb
B
(Po)
(At)
(Se)
(C)
(Bi)
(P)
9
Mahan[17]
1967
As
Te
Ge
Si
B
5
Paul, King & Farinholt[18]
1967
As
Te
Ge
Si
Sb
Se
6
Siebring[19]
1967
As
Te
Ge
Si
Sb
B
Po
Al
8
Cotton & Lynch[20]
1968
As
Te
Ge
Si
Sb
B
At
Se
C
9
Dunstan[21]
1968
As
Te
(Ge)
Sb
Po
Al
Bi
Be
Sn
Pb
7.5
Tyrell & Warren[22]
1968
As
Te
(Ge)
Si
(Sb)
B
(Po)
At
(Se)
(Al)
(C)
(P)
(I)
9.5
Williams, Embree & DeBey[23]
1968
As
Te
Ge
Si
Sb
B
Po
Al
8
Chedd[24]
1969
As
Te
Ge
Si
Sb
B
Po
At
8
Hägg[25]
1969
As
Te
Ge
Sb
At
Sn
6
Holum[26]
1969
As
Te
Ge
Si
Sb
B
Po
At
Al
9
Hunter[27]
1969
As
Te
Si
Sb
Se
5
Moody[28]
1969
As
Te
Ge
Si
Sb
B
Po
At
Al
Be
10
Dickerson, Gray & Haight[29]
1970
As
Te
Ge
Si
Sb
B
6
Hardwick & Knobler[30]
1970
As
Te
Ge
Si
Sb
B
6
Williams, Embree & DeBay[31]
1970
As
Te
Ge
Si
Sb
B
Po
Al
Be
9
Dickson[32]
1971
As
Te
Ge
Si
Sb
Po
6
Emsley[33]
1971
As
Te
Ge
Sb
4
Nitz & Dhonau[34]
1971
As
Te
Ge
Si
Sb
B
Po
7
Pimentel & Spratley[35]
1971
As
Te
Ge
Si
Sb
B
(Po)
(At)
Se
C
9
Barrow[36]
1972
As
Te
Ge
Si
B
5
Choppin & Johnsen[37]
1972
As
Te
Ge
Si
Sb
B
Se
7
Horvath[38]
1973
As
Te
Ge
Si
Sb
B
Po
7
Pascoe[39]
1973
Te
Ge
Si
B
At
Se
C
P
8
Seager & Stoker[40]
1973
As
Te
Ge
Si
Sb
B
Po
At
Al
Be
10
Allen & Keefer[41]
1974
As
Te
Ge
Si
Sb
B
At
Se
8
Andrews[42]
1974
As
Te
Si
B
At
5
Day & Johnson[43]
1974
As
Te
Ge
Si
Sb
Po
At
7
Dickson[44]
1974
As
Te
Ge
Si
Sb
Po
At
7
Duffy[45]
1974
As
Te
Ge
Sb
Se
5
Fuller[46]
1974
As
Te
Ge
Si
B
Se
C
7
Nordmann[47]
1974
As
Te
Ge
Si
B
Po
At
Se
8
O'Connor[48]
1974
As
Te
Ge
Si
Sb
B
Po
7
Rock & Gerhold[49]
1974
As
Te
Ge
Si
Sb
B
Po
At
8
Pauling & Pauling[50]
1975
As
Te
Ge
Si
Sb
B
Po
7
Hearst & Ifft[51]
1976
As
Te
Ge
Si
Sb
B
Se
7
Tyler Miller[52]
1976
As
Te
Ge
Si
Sb
B
Po
At
Al
H
10
Waser, Trueblood & Knobler[53]
1976
As
Te
Ge
Si
Sb
B
Po
7
Bloomfield[54]
1977
As
Te
Ge
Si
Sb
B
Po
At
Al
9
Ucko[55]
1977
As
Te
Ge
Si
Sb
B
Po
At
Al
9
Hill & Holman[56]
1978
As
Te
Ge
Si
B
(C)
5.5
Coxon, Fergusson & Phillips[57]
1980
As
Te
Ge
Si
(Sb)
B
At
(Be)
7
Warrena & Geballe[58]
1981
As
Te
Si
B
At
Se
C
P
S
9
Walters[59]
1982
As
Te
Ge
Si
B
5
Edwards & Sienko[60]
1983
As
Te
Ge
Sb
Po
(At)
5.5
Holtzclaw, Robinson & Nebergall[61]
1984
As
Te
Ge
Si
Sb
B
Po
At
8
Boikess & Edelson[62]
1985
As
Te
Ge
Si
B
5
Peters[63]
1986
As
Te
Ge
Si
Sb
B
Po
At
8
Hibbert & James[64]
1987
As
Te
Ge
Si
Sb
Po
Bi
7
Jones et al.[65]
1987
As
Te
Ge
Si
Sb
B
Po
At
8
McQuarrie & Rock[66]
1987
As
Te
Ge
Si
Sb
B
Po
At
8
Wulfsberg[67]
1987
As
Te
Ge
Si
Sb
B
Se
7
Thayer[68]
1988
As
Te
Ge
Si
B
P
6
Whitten, Gailey & Davis[69]
1988
As
Te
Ge
Si
Sb
B
Po
At
Al
9
Bailar et al.[70]
1989
As
Te
Ge
Si
Sb
B
Se
7
Gill[71]
1989
As
Te
Ge
Si
Sb
B
6
Malone[72]
1989
As
Te
Ge
Si
Sb
B
Po
At
8
Petrucci[73]
1989
As
Te
Ge
Si
Sb
Po
At
7
Puddephatt & Monaghan[74]
1989
As
Te
Ge
Si
Sb
B
6
Scott[75]
1989
As
Te
Ge
Si
Sb
B
6
Segal[76]
1989
As
Te
Ge
Si
Sb
B
Po
7
Oxtoby, Nachtrieb & Freeman[77]
1990
As
Te
Ge
Si
Sb
B
Po
At
8
Atkins & Beran[78]
1990
As
Te
Ge
Si
Sb
Po
6
Ebbing & Wrighton[79]
1993
As
Te
Ge
Si
Sb
B
At
7
Zumdahl[80]
1993
As
Te
Ge
Si
Sb
B
Po
At
8
Birk[81]
1994
As
Te
Ge
Si
Sb
B
Po
7
Smith[82]
1994
As
Te
Ge
Si
Sb
B
6
AAE[83]
1996
As
Te
Ge
Si
Sb
B
Se
7
Brady & Holum[84]
1996
As
Te
Ge
Si
Sb
B
Po
At
8
Harrison & de Mora[85]
1996
As
Te
Ge
Si
B
5
Hook & Post[86]
1996
As
Te
Ge
Si
Sb
B
Po
At
8
Atkins & Jones[87]
1997
As
Te
Ge
Si
Sb
Po
6
Dayah[88]
1997
As
Te
Ge
Si
Sb
B
Po
7
Mingos[89]
1998
As
Te
Ge
Si
Sb
B
Po
7
Joesten & Wood[90]
1999
As
Te
Ge
Si
Sb
B
6
Kremer[91]
1999
As
Te
Ge
Si
Sb
B
6
Thompson[92]
1999
As
Te
Ge
Si
Sb
B
6
Umland & Bellama[93]
1999
As
Te
Ge
Si
B
At
Se
7
Callister[94]
2000
As
Te
Ge
Si
B
Se
C
7
Enloe[95]
2000
As
Te
Si
B
At
5
Mann, Meek & Allen[96]
2000
As
Te
Ge
Si
Sb
B
Po
Bi
8
Phillips, Stozak & Wistrom[97]
2000
As
Te
Ge
Si
Sb
B
Po
At
8
Ryan[98]
2000
As
Te
Ge
Si
B
5
Hawkes[99]
2001
As
Te
Ge
Sb
Se
Bi
6
Lewis & Evans[100]
2001
As
Te
Ge
Si
Sb
B
Po
7
Masterton & Hurley[101]
2001
As
Te
Ge
Si
Sb
B
6
Barrett[102]
2002
(As)
(Te)
(Ge)
(Si)
(Sb)
(B)
(Se)
3.5
Chang[103]
2002
As
Te
Ge
Si
Sb
B
Po
At
Lv
Ts
10
Harding, Johnson & Janes[104]
2002
As
Te
Ge
Si
Sb
5
Johnson[105]
2002
As
Te
Ge
Si
Sb
At
6
Rodgers[106]
2002
As
Te
Ge
Si
Sb
B
At
7
Szefer[107]
2002
As
Te
Ge
Si
Sb
Se
6
Woodgate[108]
2002
As
Te
Ge
Sb
Al
5
Wright & Welbourn[109]
2002
As
Te
Ge
Si
B
5
e-encyclopedia[110]
2003
As
Te
Ge
Si
Sb
B
Se
7
Gupta[111]
2003
As
Te
Ge
Si
Sb
B
6
Hunt[112]
2003
As
Te
Ge
Si
Sb
B
6
Myers[113]
2003
As
Te
Ge
Si
Sb
B
At
Se
8
Williams[114]
2003
As
Te
Ge
Si
Sb
B
Po
7
Atkins[115]
2004
As
Te
Ge
Si
Sb
B
Po
7
Cox[116]
2004
As
Te
Ge
Si
Sb
Se
6
Gilbert, Kirss & Davies[117]
2004
As
Te
Ge
Si
Sb
B
At
Se
8
Reilly[118]
2004
As
Te
Ge
Si
Sb
B
Po
At
Se
9
Ebbing & Gammon[119]
2005
As
Te
Ge
Si
Sb
B
At
7
Fry & Page[120]
2005
As
Te
Ge
Si
Sb
B
6
Halliday, Resnick & Walker[121]
2005
As
Te
Ge
Si
Sb
B
Po
At
8
Holler & Selegue[122]
2005
As
Te
Ge
Si
Sb
B
Po
(At)
7.5
Kotz, Treichel & Weaver[123]
2005
As
Te
Ge
Si
Sb
B
6
Meyer[124]
2005
As
Te
Ge
Si
Sb
B
At
7
Orchin[125]
2005
As
Te
Ge
Si
Sb
B
Po
At
8
Swenson[126]
2005
As
Te
Ge
Si
Sb
B
Po
At
Se
C
Bi
11
Baird[127]
2006
As
Te
Ge
Si
Sb
B
At
7
Blei & Odian[128]
2006
As
Te
Ge
Si
Sb
Po
At
Lv
8
Brown & Holme[129]
2006
As
Te
Ge
Si
Sb
B
At
7
Dashek & Harrison[130]
2006
As
Te
Ge
Si
Sb
B
Po
At
8
Finch et al.[131]
2006
As
Te
Ge
Si
Sb
B
Se
7
Goldfrank & Flomenbaum[132]
2006
As
Te
Ge
Si
Sb
B
At
7
Hatt[133]
2006
As
Te
Ge
Si
Sb
B
Se
7
Hérold[134]
2006
As
Ge
Si
B
Po
(At)
Se
C
Bi
P
9.5
McMonagle[135]
2006
As
Te
Ge
Si
B
Lv
Fl Mc
8
Rayner-Canham & Overton[136]
2006
As
Te
Ge
Si
B
5
Silberberg[137]
2006
As
Te
Ge
Si
Sb
B
6
Slade[138]
2006
As
Te
Ge
Si
Sb
B
Po
7
Wertheim, Oxlade & Stockley[139]
2006
As
Te
Ge
Si
Sb
B
At
Se
8
Whitley[140]
2006
As
Te
Ge
Si
Sb
B
Po
7
American Chemical Society[141]
2007
As
Te
Ge
Si
Sb
B
Po
7
Astruc[142]
2007
As
Si
B
Se
P
S
6
Casper[143]
2007
As
Te
Ge
Si
Sb
B
Po
7
Crystal[144]
2007
As
Te
Ge
Si
Sb
B
Po
7
DeGraff[145]
2007
As
Te
Ge
Si
Sb
B
Po
7
Joesten, Hogg & Castellion[146]
2007
As
Te
Ge
Si
Sb
B
6
Lewis[147]
2007
As
Te
Ge
Si
Sb
B
Po
Se
C
P
S
11
Petty[148]
2007
As
Te
Ge
Si
Sb
B
Po
At
Se
C
Bi
P
Sn
13
Rösler, Harders & Bäker[149]
2007
As
Te
Ge
Si
Sb
B
(Sn)
6.5
Saunders[150]
2007
As
Te
Ge
Si
Sb
B
Po
At
8
Saunders[151]
2007
As
Te
Ge
Si
Sb
B
Po
At
8
Shipman, Wilson & Tood[152]
2007
As
Te
Ge
Si
Sb
B
6
Bauer, Birk & Sawyer[153]
2008
As
Te
Ge
Si
Sb
B
At
7
Clugston & Flemming[154]
2008
As
Te
Ge
Si
Sb
Se
6
Encyclopedia Columbia[155]
2008
As
Te
Sb
Se
4
Ham[156]
2008
As
Te
Ge
Si
Sb
B
Po
7
Kelter, Mosher & Scott[157]
2008
As
Te
Ge
Si
Sb
B
At
7
Masterton & Hurley[158]
2008
As
Te
Ge
Si
Sb
B
6
Merck[159]
2008
As
Te
Ge
Si
Sb
B
Po
7
Nicolaou & Montagnon[160]
2008
As
Te
Ge
Si
Sb
B
Po
At
C
9
Řezanka & Sigler[161]
2008
As
Te
Si
B
At
Se
6
Tro & Neu[162]
2008
As
Te
Ge
Si
Sb
B
6
Vallero[163]
2008
As
Te
Ge
Si
Sb
B
Po
7
Brown et al.[164]
2009
As
Te
Ge
Si
Sb
B
6
Burrows et al.[165]
2009
As
Te
Ge
Si
Sb
B
Se
7
Castor-Perry[166]
2009
As
Te
Ge
Si
Sb
B
Po
At
I
9
Cracolice & Peters[167]
2009
As
Te
Ge
Si
Sb
B
At
7
Economou[168]
2009
As
Te
Ge
Si
Sb
B
Po
At
Al
9
Habashi[169]
2009
As
Te
Ge
Si
Sb
B
Po
Se
Bi
9
Hein & Arena[170]
2009
As
Te
Ge
Si
Sb
B
Po
7
Leach[171]
2009
As
Te
Ge
Si
Sb
B
Po
7
Manning[172]
2009
As
Te
Ge
Si
Sb
B
Po
7
McMurray & Fay[173]
2009
As
Te
Ge
Si
Sb
B
At
7
Reger, Goode & Ball[174]
2009
As
Te
Ge
Si
Sb
B
6
Schnepp[175]
2009
As
Te
Ge
Si
Sb
B
Po
At
8
Shubert & Leyba[176]
2009
As
Te
Ge
Si
Sb
B
6
Whitten et al.[177]
2009
As
Te
Ge
Si
Sb
B
At
7
Aldinger & Weberruss[178]
2010
As
Te
Ge
Si
Sb
B
6
Banks et al.[179]
2010
As
Te
Ge
Si
Sb
B
6
Fayer[180]
2010
As
Te
Ge
Si
Sb
B
Po
At
8
Gray[181]
2010
As
Te
Ge
Si
Sb
B
Po
7
Groysman[182]
2010
As
Te
Ge
Si
Sb
Po
6
Halka & Nordstrom[183]
2010
As
Te
Ge
Si
Sb
B
Po
7
Lombi E & Holm PE[184]
2010
As
Te
Ge
Si
Sb
B
Po
At
8
NEST Association[185]
2010
As
Te
Ge
Si
Sb
B
At
7
RCCS[186]
2010
As
Te
Ge
Si
Sb
B
Po
At
Se
C
Bi
P
Sn
13
Senese[187]
2010
As
Te
Ge
Si
Sb
(B)
Po
At
(Se)
C
9
Weiner[188]
2010
As
Te
Ge
Si
Sb
B
Po
7
Barbalace[189]
2011
As
Te
Ge
Si
Sb
B
Po
7
Encyclopædia Britannica Online[190]
2011
As
Te
Ge
Si
Sb
B
(Po)
(At)
7
Helmenstine[191]
2011
As
Te
Ge
Si
Sb
B
(Po)
6.5
Moore[192]
2011
As
Te
Ge
Si
Sb
B
At
7
QA International[193]
2011
As
Te
Ge
Si
Sb
B
Se
7
Element
Arsenic
Tellurium
Germanium
Silicon
Antimony
Boron
Polonium
Astatine
Selenium
Aluminium
Carbon
Bismuth
Phosphorus
Beryllium
Tin
Sulfur
Livermorium
Iodine
Other
() Parenthesized symbols indicate elements whose inclusion in a particular metalloid list is qualified in some way by the author(s). It is counted as 0.5 citation.
There is an average of 7.15 elements per metalloid list.
Appearance frequency clusters
Clusters of elements and their appearance in the sources
Elements cited in the listed sources (as of August 2011; n = 194) have appearance frequencies that occur in clusters of comparable values. The diamonds in the graph mark the mean appearance frequency of each cluster.
Cluster 1 (93%): B, Si, Ge, As, Sb, Te
Cluster 2 (44%): Po, At
Cluster 3 (24%): Se
Cluster 4 (9%): C, Al
Cluster 5 (5%): Be, P, Bi
Cluster 6 (3%): Sn
Cluster 7 (1%): H, Ga, S, I, Pb, Fl, Mc, Lv, Ts
The resulting geometric trend line has the formula y = 199.47e−0.7423x and an R2 value of 0.9962.[n 2]
Elements regarded as metalloids
The elements commonly classified as metalloids are boron, silicon, germanium, arsenic, antimony and tellurium.[n 3]
The status of polonium and astatine is not settled. Most authors recognise one or the other, or both, as metalloids; Herman, Hoffmann and Ashcroft, on the basis of relativistic modelling, predict astatine will be a monatomic metal.[n 4] One or more of carbon, aluminium, phosphorus, selenium, tin or bismuth, these being periodic table neighbours of the elements commonly classified as metalloids, are sometimes recognised as metalloids.[n 5]
Selenium, in particular, is commonly designated as a metalloid in environmental chemistry[n 6] on account of similarities in its aquatic chemistry with that of arsenic and antimony.[n 7] There are fewer references to beryllium, in spite of its periodic table position adjoining the dividing line between metals and nonmetals. Isolated references in the literature can also be found to the categorisation of other elements as metalloids. These elements include: hydrogen, nitrogen,[n 8] sulfur,[n 9] zinc,[n 10] gallium,[n 11] iodine,[n 12] lead,[n 13] and radon[n 14] (citations are for references other than those listed above).
Notes
↑Lack of a rigorous definition:
Goldsmith RH 1982, 'Metalloids', Journal of Chemical Education, vol. 59, no. 6, pp. 526–527, doi:10.1021/ed059p526
Hawkes SJ 2001, 'Semimetallicity', Journal of Chemical Education, vol. 78, no. 12, pp. 1686–87, doi:10.1021/ed078p1686
↑The R2 value is a measure of how close a formula fits a set of data points. Values fall between 0.0 and 1.0, with those near 1.0 indicating a good fit.
↑Elements commonly classified as metalloids:
Goldsmith RH 1982, 'Metalloids', Journal of Chemical Education, vol. 59, no. 6, pp. 526–7 (526), doi:10.1021/ed059p526
Mann JB, Meek TL & Allen LC 2000, 'Configuration energies of the main group elements', Journal of the American Chemical Society, vol. 122, no. 12, pp. 2780–3 (2783), doi:10.1021ja992866e: Mann et al. refer to these elements as 'the recognized metalloids'.
Kotz JC, Treichel P & Weaver GC 2009, Chemistry and Chemical Reactivity, 7th ed., Brooks/Cole, Belmont, California, ISBN:1439041318
↑Polonium and astatine:
Hawkes SJ 2001, 'Semimetallicity?', Journal of Chemical Education, vol. 78, no. 12, pp. 1686–87, doi:10.1021/ed078p1686
Holt, Rinehart & Wilson c. 2007 'Why polonium and astatine are not metalloids in HRW texts', viewed 8 February 2013
Hawkes SJ 2010, 'Polonium and astatine are not semimetals', Journal of Chemical Education, vol. 87, no. 8, p. 783, doi:10.1021ed100308w
Hermann A, Hoffmann R & Ashcroft NW 2013, 'Condensed Astatine: Monatomic and Metallic', Physical Review Letters, vol. 111, pp. 11604–1−11604-5, doi:10.1103/PhysRevLett.111.116404
Vernon RE 2013, 'Which Elements Are Metalloids?', Journal of Chemical Education, vol. 90, no. 12, pp. 1703–1707, doi:10.1021/ed3008457
Rochow EG 1966, The metalloids, DC Heath and Company, Boston, pp. 7–8
Cobb HM 2012, Dictionary of Metals, ASM International, Materials Park, OH, p. 145, ISBN:9781615039784
Walker CH 2012, Organic Pollutants: An Ecotoxicological Perspective, 2nd ed., CRC Press, Boca Raton, FL, p. 163, ISBN:9781420062588
Whiten K, Davis R, Peck L & Stanley G 2014, Chemistry, 10th ed., Brooks/Cole Cengage Learning, Belmont, CA, p. 134, ISBN:9781133610663
↑Selenium as a metalloid in environmental chemistry:
Meyer JS, Adams WJ, Brix KV, Luoma SM, Mount DR, Stubblefield WA & Wood CM (eds) 2005, Toxicity of dietborne metals to aquatic organisms, Proceedings from the Pellston Workshop on Toxicity of Dietborne Metals to Aquatic Organisms, 27 July – 1 August 2002, Fairmont Hot Springs, British Columbia, Canada, Society of Environmental Toxicology and Chemistry, Pensacola, Florida, p. 284, ISBN:1880611708
Weiner ER 2013, Applications of Environmental Aquatic Chemistry: A Practical Guide, 3rd ed., CRC Press, Boca Raton, FL, p. 181, ISBN:9781439853320
↑Similarities in the aquatic chemistry of selenium, arsenic, and antimony:
US Environmental Protection Agency 1988, Ambient aquatic life water quality criteria for antimony (III), draft, Office of Research and Development, Environmental Research Laboratories, Washington, p. 1
De Zuane J 1997, Handbook of drinking water quality, 2nd ed., John Wiley & Sons, New York, p. 93, ISBN:047128789X
Uden PC 2005, 'Speciation of selenium,' in R Cornelis, J Caruso, H Crews & K Heumann (eds), Handbook of elemental speciation II: Species in the environment, food, medicine and occupational health, John Wiley & Sons, Chichester, pp. 346–65 (347–8), ISBN:0470855983
Dev N 2008, 'Modelling selenium fate and transport in Great Salt Lake Wetlands' PhD dissertation, University of Utah, ProQuest, Ann Arbor, Michigan, pp. 2–3, ISBN:054986542X
↑Nitrogen:
Rausch MD 1960, 'Cyclopentadienyl compounds of metals and metalloids', Journal of Chemical Education, vol. 37, no. 11, pp. 568–78, doi:10.1021/ed037p568
↑Sulfur:
Chalmers B 1959, Physical metallurgy, John Wiley & Sons, New York, p. 72
US Bureau of Naval Personnel 1965, Shipfitter 3 & 2, US Government Printing Office, Washington, p. 26
↑Zinc:
Siebring BR 1967, Chemistry, MacMillan, New York, p. 613
↑Gallium:
Wiberg N 2001, Inorganic chemistry, Academic Press, San Diego, p. 282, ISBN:0123526515
↑Iodine:
Friend JN 1953, Man and the chemical elements, 1st ed., Charles Scribner's Sons, New York, p. 68
Rausch MD 1960, 'Cyclopentadienyl compounds of metals and metalloids', Journal of Chemical Education, vol. 37, no. 11, pp. 568–78, doi:10.1021/ed037p568
↑Lead:
Murray JF 1928, 'Cable-sheath corrosion', Electrical World, vol. 92, Dec 29, pp. 1295–7 (1295)
↑Radon:
Hampel CA & Hawley GG 1966, The encyclopedia of chemistry, 3rd ed., Van Nostrand Reinhold, New York,p. 950
Stein L 1985, 'New evidence that radon is a metalloid element: ion-exchange reactions of cationic radon', Journal of the Chemical Society, Chemical Communications, vol. 22, pp. 1631–2, doi:10.1039/C39850001631
Stein L 1987, 'Chemical properties of radon' in PK Hopke (ed.) 1987, Radon and its decay products: Occurrence, properties, and health effects, American Chemical Society, Washington DC, pp. 240–51 (240, 247–8), ISBN:0841210152
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v
t
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Periodic table
Periodic table forms
Standard
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Alternative
Alternatives
Janet's left step table
Extended
Extension beyond the 7th period
Aufbau
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Pyykkö
Sets of elements
By periodic table structure
Groups
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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
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
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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Original source: https://en.wikipedia.org/wiki/Lists of metalloids. Read more