A081100 -id:A081100

A081101

Atomic numbers of the chemical elements sorted with respect to single-bond covalent radius.

+10
9

1, 2, 8, 9, 10, 7, 6, 5, 18, 17, 4, 16, 28, 15, 27, 29, 35, 14, 26, 34, 36, 30, 25, 46, 32, 33, 111, 24, 77, 112, 78, 31, 79, 44, 45, 13, 43, 47, 110, 76, 109, 54, 75, 3, 53, 80, 23, 108, 22, 48, 52, 113, 74, 42, 12, 50, 51, 107, 49, 86, 106, 114, 81, 82, 84, 73, 41, 85, 21, 105, 83, 72, 40, 11, 104, 118, 103, 71, 115, 39, 58, 69, 68, 99, 117, 67, 95, 96, 66, 100, 63, 65, 97, 98, 64, 91, 70, 92, 20, 93, 62, 94, 61, 101, 60, 90, 116, 59, 102, 57, 38, 89, 19, 56, 88, 37, 87, 55

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

For chemical elements there are single-, double- and triple-bond covalent radii. This sequence uses single-bond covalent radii. If the data for two elements are the same then they are sorted by atomic number (for example, the data for titanium (22) and cadmium (48) are both 136 pm so 22 comes before 48). - Jianing Song, Oct 01 2018

LINKS

Table of n, a(n) for n=1..118.

P. Pyykkö, M. Atsumi, Molecular Single-Bond Covalent Radii for Elements 1-118, Chemistry: A European Journal (2009) 15: 186-197.

Wikipedia, Radii for multiple bonds.

EXAMPLE

The elements with the smallest covalent radii are hydrogen (1), helium (2), oxygen (8) etc.

CROSSREFS

Chemical elements sorted by: A081098 (melting point), A081099 (boiling point), A081100 (atomic radius), this sequence (covalent radius), A248026 (electronegativity), A248061 (density), A249874 (discovery).

Cf. A319914 (single-bond covalent radii of the elements).

KEYWORD

nonn

AUTHOR

Ralf Stephan, Mar 05 2003

EXTENSIONS

Edited by Jianing Song, Oct 01 2018

Further edited by N. J. A. Sloane, Oct 06 2018

STATUS

approved

A081098

Atomic numbers of the chemical elements sorted with respect to melting point.

+10
8

2, 1, 10, 9, 8, 7, 18, 36, 54, 17, 86, 80, 35, 87, 55, 31, 37, 15, 19, 11, 53, 16, 49, 34, 3, 50, 84, 83, 85, 81, 48, 82, 30, 52, 51, 94, 93, 12, 13, 88, 56, 38, 58, 33, 70, 63, 101, 102, 20, 100, 99, 98, 57, 59, 32, 47, 97, 60, 61, 89, 79, 62, 29, 92, 95, 25, 4, 64, 96, 65, 66, 14, 28, 67, 27, 39, 68, 26, 21, 69, 46, 91, 103, 71, 22, 78, 90, 40, 24, 23, 45, 5, 104, 43, 72, 44, 77, 41, 42, 73, 76, 75, 74, 6

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

From Jianing Song, Sep 30 2018: (Start)

Helium (2) cannot solidify at standard atmospheric pressure, its melting point (0.95 K) is measured at 2.5 MPa. Carbon (6) and arsenic (33) cannot liquify at standard atmospheric pressure, their melting points (4600 K and 1090 K) are measured at 10.8 MPa and 2.8 MPa, respectively.

The melting points of astatine (85), francium (87), fermium (100) to rutherfordium (104) are only estimated due to the short half-life of these elements. (End)

LINKS

Table of n, a(n) for n=1..104.

Wikipedia, List of chemical elements.

EXAMPLE

The elements with the lowest melting point are helium (2), hydrogen (1), neon (10), etc.

CROSSREFS

Chemical elements sorted by: A081098 (melting point), A081099 (boiling point), A081100 (atomic radius), A081101 (covalent radius), A248026 (electronegativity), A248061 (density), A249874 (discovery).

KEYWORD

nonn

AUTHOR

Ralf Stephan, Mar 05 2003

EXTENSIONS

Edited by Jianing Song, Sep 30 2018

Further edited by N. J. A. Sloane, Oct 06 2018

STATUS

approved

A081099

Atomic numbers of the chemical elements sorted with respect to boiling point.

+10
7

2, 1, 10, 7, 9, 18, 8, 36, 54, 86, 17, 35, 53, 15, 85, 80, 16, 33, 55, 87, 34, 37, 19, 48, 11, 30, 84, 52, 99, 12, 70, 3, 38, 98, 81, 20, 63, 83, 51, 88, 82, 62, 56, 69, 25, 49, 47, 31, 4, 13, 29, 66, 50, 95, 97, 24, 67, 32, 21, 79, 26, 68, 28, 27, 46, 61, 60, 96, 89, 94, 65, 14, 64, 22, 39, 71, 23, 58, 57, 59, 45, 78, 5, 93, 91, 6, 92, 44, 43, 40, 77, 72, 42, 41, 90, 76, 73, 74, 75

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

From Jianing Song, Sep 30 2018: (Start)

Carbon (6) and arsenic (33) cannot liquify at standard atmospheric pressure, so their sublimation points are used instead of boiling points.

The boiling points of astatine (85), francium (87), californium (98) and einsteinium (99) are only estimated due to the short half-life of these elements. (End)

LINKS

Table of n, a(n) for n=1..99.

Wikipedia, List of chemical elements.

EXAMPLE

The lowest boiling points are helium (2), hydrogen (1), neon (10), etc.

CROSSREFS

Chemical elements sorted by: A081098 (melting point), this sequence (boiling point), A081100 (atomic radius), A081101 (covalent radius), A248026 (electronegativity), A248061 (density), A249874 (discovery).

KEYWORD

nonn

AUTHOR

Ralf Stephan, Mar 05 2003

EXTENSIONS

Edited by Jianing Song, Sep 30 2018

Further edited by N. J. A. Sloane, Oct 06 2018

STATUS

approved

A248026

Atomic numbers of the chemical elements sorted by electronegativity (Pauling scale).

+10
7

87, 55, 19, 37, 56, 88, 11, 38, 3, 20, 57, 65, 70, 89, 58, 59, 61, 95, 60, 62, 63, 64, 39, 66, 67, 68, 69, 71, 94, 96, 72, 90, 97, 98, 99, 100, 101, 102, 103, 12, 40, 21, 93, 92, 73, 91, 22, 25, 4, 41, 13, 81, 23, 30, 24, 48, 49, 31, 26, 82, 27, 14, 29, 43, 75, 28, 47, 50, 80, 84, 32, 83, 5, 51, 52, 42, 33, 15, 1, 44, 46, 76, 77, 85, 86, 45, 78, 74, 79, 6, 34, 16, 54, 53, 35, 36, 7, 17, 8, 9

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Helium (2), neon (10) and argon (18) do not have electronegativity in Pauling scale, so they are omitted. If the data for two elements are the same then they are sorted by atomic number (for example, the data for scandium (21) and neptunium (93) are both 1.36 so 21 comes before 93). - Jianing Song, Oct 01 2018

LINKS

Table of n, a(n) for n=1..100.

Wikipedia, Electronegativity

Wikipedia, Electronegativities of the elements (data page)

EXAMPLE

The elements with the lowest electronegativities are francium (87), caesium (55), potassium (19), rubidium (37), etc.

CROSSREFS

Chemical elements sorted by: A081098 (melting point), A081099 (boiling point), A081100 (atomic radius), A081101 (covalent radius), this sequence (electronegativity), A248061 (density), A249874 (discovery).

KEYWORD

nonn

AUTHOR

Bo Lee, Oct 03 2014

EXTENSIONS

'Element' changed to 'Atomic' in name by Jon Perry, Oct 29 2014

Edited by Jianing Song, Oct 01 2018

STATUS

approved

A248061

Element numbers of the chemical elements sorted with respect to density.

+10
7

1, 2, 10, 7, 8, 9, 18, 17, 36, 54, 86, 3, 19, 11, 37, 20, 12, 15, 4, 87, 55, 16, 6, 14, 5, 38, 13, 21, 35, 56, 39, 22, 34, 53, 118, 63, 32, 88, 33, 31, 23, 57, 52, 40, 51, 58, 59, 70, 85, 60, 30, 24, 117, 61, 50, 49, 25, 62, 26, 64, 65, 66, 41, 48, 67, 99, 27, 28, 29, 68, 84, 69, 100, 83, 71, 102, 89, 42, 101, 47, 82, 43, 90, 81, 46, 44, 45, 116, 72, 115, 96, 80, 95, 114, 97, 98, 91, 103, 113, 73, 92, 74, 79, 94, 93, 75, 78, 77, 76, 104, 112, 111, 105, 110, 106, 107, 109, 108

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

The densities are measured at standard atmospheric pressure. The densities of astatine (85), francium (87), fermium (100) and above are only estimated due to the short half-life of these elements. - Jianing Song, Sep 30 2018

LINKS

Table of n, a(n) for n=1..118.

Wikipedia, List of chemical elements.

EXAMPLE

The elements with the lowest densities are hydrogen (1), helium (2), neon (10), etc.

CROSSREFS

Chemical elements sorted by: A081098 (melting point), A081099 (boiling point), A081100 (atomic radius), A081101 (covalent radius), A248026 (electronegativity), this sequence (density), A249874 (discovery).

KEYWORD

nonn

AUTHOR

Bo Lee, Sep 30 2014

EXTENSIONS

Edited by Jianing Song, Sep 30 2018

STATUS

approved

A249874

Atomic numbers of the chemical elements sorted by date of discovery.

+10
7

15, 27, 78, 28, 83, 12, 1, 8, 7, 56, 17, 25, 42, 74, 52, 38, 40, 92, 22, 39, 24, 4, 23, 41, 73, 46, 58, 76, 77, 45, 19, 11, 20, 5, 9, 53, 3, 48, 34, 14, 13, 35, 90, 57, 68, 65, 44, 55, 37, 81, 49, 2, 31, 70, 67, 69, 21, 62, 64, 59, 60, 32, 66, 18, 63, 36, 10, 54, 84, 88, 86, 89, 71, 75, 91, 72, 43, 87, 93, 85, 94, 61, 96, 95, 97, 98, 99, 100, 101, 103, 102, 104, 105, 106, 107, 109, 108, 110, 111, 112, 114, 116, 118, 115, 113, 117

(list; graph; refs; listen; history; text; internal format)

OFFSET

13,1

COMMENTS

Since the first 12 elements (carbon (6), sulfur (16), iron (26), copper (29), zinc (30), arsenic (33), silver (47), tin (50), antimony (51), gold (79), mercury (80), and lead (82)) are "ancient" (and hence the exact order of their discovery is vague), they have been omitted. The list starts with the first actual date that is given, which is 1669.

LINKS

Table of n, a(n) for n=13..118.

Wikipedia, Timeline of chemical element discoveries.

EXAMPLE

Year of their discovery: 1669, 1735, 1735, 1751, 1753, 1755, 1766, 1771, 1772, 1772, 1774, 1774, 1778, 1781, 1782, 1787, 1789, 1789, 1791, 1794, 1794, 1798, 1801, 1801, 1802, 1802, 1803, 1803, 1803, 1804, 1807, 1807, 1808, 1808, 1810, 1811, 1817, 1817, 1817, 1823, 1825, 1825, 1829, 1838, 1843, 1843, 1844, 1860, 1861, 1861, 1863, 1868, 1875, 1878, 1878, 1879, 1879, 1879, 1880, 1885, 1885, 1886, 1886, 1894, 1896, 1898, 1898, 1898, 1898, 1898, 1899, 1902, 1906, 1908, 1913, 1922, 1937, 1939, 1940, 1940, 1940, 1942, 1944, 1944, 1949, 1950, 1952, 1952, 1955, 1961, 1966, 1969, 1970, 1974, 1981, 1982, 1984, 1994, 1994, 1996, 1999, 2000, 2002, 2003, 2003, 2009. - Jianing Song, Sep 30 2018

CROSSREFS

Chemical elements sorted by: A081098 (melting point), A081099 (boiling point), A081100 (atomic radius), A081101 (covalent radius), A248026 (electronegativity), A248061 (density), this sequence (discovery).

KEYWORD

nonn,less

AUTHOR

Bo Lee, Nov 07 2014

EXTENSIONS

Offset changed to 13 by N. J. A. Sloane, Oct 06 2018

STATUS

approved

A319904

Calculated atomic radii (in picometers) of the chemical elements.

+10
1

53, 31, 167, 112, 87, 67, 56, 48, 42, 38, 190, 145, 118, 111, 98, 88, 79, 71, 243, 194, 184, 176, 171, 166, 161, 156, 152, 149, 145, 142, 136, 125, 114, 103, 94, 88, 265, 219, 212, 206, 198, 190, 183, 178, 173, 169, 165, 161, 156, 145, 133, 123, 115, 108, 298, 253, 251, 249, 247, 206, 205, 238, 231, 233, 225, 228, 227, 226, 222, 222, 217, 208, 200, 193, 188, 185, 180, 177, 174, 171, 156, 154, 143, 135, 127, 120

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

For chemical elements there are empirically measured atomic radii, calculated atomic radii, van der Waals radii and covalent radii to measure the "size" of their atoms. This sequence lists the calculated atomic radii.

The values for chemical elements in each period (1 - 2, 3 - 10, 11 - 18, 19 - 36, 37 - 54, 55 - 86) are decreasing except for those of some lanthanide elements.

LINKS

Table of n, a(n) for n=1..86.

Wikipedia, Calculated atomic radii.

EXAMPLE

The calculated atomic radii for hydrogen (1), helium (2) and lithium (3), etc. are 53 pm, 32 pm, 167 pm, etc.

CROSSREFS

Cf. A081100, A081101 (but remember they are not based on this sequence).

Cf. A319914 (covalent radius).

KEYWORD

nonn,look

AUTHOR

Jianing Song, Oct 01 2018

STATUS

approved

A320507

Atomic numbers of the chemical elements sorted with respect to first ionization energy.

+10
1

55, 87, 37, 19, 103, 11, 89, 56, 88, 3, 71, 59, 60, 58, 57, 61, 62, 63, 38, 49, 65, 91, 66, 13, 95, 31, 104, 96, 67, 94, 90, 68, 81, 20, 64, 69, 92, 39, 97, 70, 93, 98, 99, 100, 21, 101, 40, 102, 23, 41, 24, 72, 22, 42, 43, 83, 50, 44, 82, 25, 45, 47, 28, 12, 29, 75, 27, 73, 32, 26, 74, 14, 5, 46, 84, 51, 76, 48, 52, 78, 77, 79, 85, 4, 30, 34, 33, 16, 80, 53, 15, 86, 6, 35, 54, 17, 1, 8, 36, 7, 18, 9, 10, 2

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

The first ionization energy of an element X is the enthalpy change of X (g) -> X+ (g) + e-.

LINKS

Table of n, a(n) for n=1..104.

NIST Atomic Spectra Database, Ionization Energies Form

Wikipedia, Ionization energies of the elements (data page)

EXAMPLE

The elements with the lowest first ionization energies are caesium (55), francium (87), rubidium (37), potassium (19), etc.

CROSSREFS

Cf. A320506 (first ionization energies).

Chemical elements sorted by: A081098 (melting point), A081099 (boiling point), A081100 (atomic radius), A081101 (covalent radius), A248026 (electronegativity), A248061 (density), A249874 (discovery), this sequence (first ionization energy).

KEYWORD

nonn

AUTHOR

Jianing Song, Oct 13 2018

STATUS

approved