Bòr (B)

chemical element with symbol B and atomic number 5

Atomic Number	5
Atomic Weight	10.81
mass number	11

Group	13
Period	2
Block	p

proton	5 p⁺
neutron	6 n⁰
electron	5 e^-

Proprietat Fisica

Rai Atomic	85 pm 205 pm
molar volume	4.6 cm³/mol
covalent radius	85 pm 78 pm 73 pm 84 pm
Metallic Radius	80 pm 98 pm
ionic radius	1 pm 11 pm 27 pm
Crystal Radius	15 pm 25 pm 41 pm
Rai de van der Waals	180 pm 402 pm 192 pm 215 pm 192 pm 408.3 pm
densitat	2.34 g/cm³ 2080 kg/m³

Chemical Property

energia

proton affinity
electron affinity	0.279723 eV/particle
ionization energy	8.298019 eV/particle 25.15483 eV/particle 37.93058 eV/particle 259.3715 eV/particle 340.226008 eV/particle

enthalpy of vaporization	504.5 kJ/mol
enthalpy of fusion	23.6 kJ/mol
standard enthalpy of formation	565 kJ/mol
electron

electron shell	2, 3

valence electron	3 ⓘ

electron configuration	[He] 2s² 2p¹ⓘ 1s² 2s² 2p¹

oxidation number	-5, -1, 0, 1, 2, 3
Electronegativitat	12.13 eV/particle 0.184886 2.04
Electrophilicity Index	1.1470276511768214 eV/particle
fundamental state of matter

estat de la matèria	Solid
gaseous state of matter
Boiling Point	4273.15 K
Melting Point	2350.15 K
critical pressure
critical temperature
Ponch triple
appearance
Color	Black #00ff00 #ffb5b5 #ffb5b5
appearance	black-brown
Indici de refraccion
thermodynamic material property
Thermal Conductivity	27.4 W/(m K)
thermal expansion	0.000006 1/K
molar heat capacity	11.087 J/(mol K)
Specific Heat Capacity	1.026 J/(g⋅K)
heat capacity ratio
electrical properties
type	Insulator
electrical conductivity	0.0000000001 MS/m
electrical resistivity	10000 Ω*m
superconductivity
magnetism
type	diamagnetic
magnetic susceptibility (Mass)	-0.0000000087 m³/Kg
magnetic susceptibility (Molar)	-0.0000000000941 m³/mol
magnetic susceptibility (Volume)	-0.0000214
magnetic ordering
Curie temperature
Néel temperature
estructura
Crystal Structure	Simple Trigonal (TET)
lattice constant	8.73 Å
Lattice Angles	1.01334, 1.01334, 1.01334
mechanical property
Duretat	9.3 MPa 49000 MPa
bulk modulus	320 GPa
shear modulus
Young's modulus
Poisson's ratio
speed of sound	16200 m/s
classification
Category	Metalloids, Metalloids
CAS Group	IIIB
IUPAC Group	IIIA
Glawe Number	86
Mendeleev Number	81
Pettifor Number	86
Geochemical Class
Goldschmidt classification	litophile

other

Gas Basicity
polarizability	20.5 ± 0.1 a₀
C6 Dispersion Coefficient	99.5 a₀ 99.2 a₀
allotrope	Alpha Rhombohedral Boron, Beta Rhombohedral Boron, Alpha Tetragonal Boron
Neutron cross section	760
Neutron Mass Absorption	2.4
quantum number	2P1/2
space group	166 (R_3m)

Isotopes of Boron

Stable Isotopes	2
Unstable Isotopes	14
Natural Isotopes	2

⁶B

mass number	6
neutron number	1
Relative Atomic Mass	6.0508 ± 0.00215 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	2
nuclear quadrupole moment
data de descobèrta
parity	-

decay mode	intensity
2p (2-proton emission)

⁷B

mass number	7
neutron number	2
Relative Atomic Mass	7.029712 ± 0.000027 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	570 ± 14 ys
Espin	3/2
nuclear quadrupole moment
data de descobèrta	1967
parity	-

decay mode	intensity
p (proton emission)	100%

⁸B

mass number	8
neutron number	3
Relative Atomic Mass	8.024607315 ± 0.000001073 Da
g-factor	0.51775 ± 0.00015
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	771.9 ± 0.9 ms
Espin	2
nuclear quadrupole moment	0.0643 ± 0.0014
data de descobèrta	1950
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺α (β⁺-delayed α emission)	100%

⁹B

mass number	9
neutron number	4
Relative Atomic Mass	9.013329645 ± 0.000000969 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	800 ± 300 zs
Espin	3/2
nuclear quadrupole moment
data de descobèrta	1940
parity	-

decay mode	intensity
p (proton emission)	100%

¹⁰B

mass number	10
neutron number	5
Relative Atomic Mass	10.012936862 ± 0.000000016 Da
g-factor	0.60015453333333 ± 0.00000026666666666667
natural abundance	19.65 ± 0.44
Radioactivitat	stable isotope
Semivida	Not Radioactive ☢️
Espin	3
nuclear quadrupole moment	0.0846 ± 0.0002
data de descobèrta	1920
parity	+

¹¹B

mass number	11
neutron number	6
Relative Atomic Mass	11.009305166 ± 0.000000013 Da
g-factor	1.792252 ± 0.00000066666666666667
natural abundance	80.35 ± 0.44
Radioactivitat	stable isotope
Semivida	Not Radioactive ☢️
Espin	3/2
nuclear quadrupole moment	0.04059 ± 0.0001
data de descobèrta	1920
parity	-

¹²B

mass number	12
neutron number	7
Relative Atomic Mass	12.014352638 ± 0.000001418 Da
g-factor	1.003 ± 0.001
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	20.2 ± 0.02 ms
Espin	1
nuclear quadrupole moment	0.0132 ± 0.0003
data de descobèrta	1935
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻α (β⁻-delayed α emission)	0.6%

¹³B

mass number	13
neutron number	8
Relative Atomic Mass	13.017779981 ± 0.000001073 Da
g-factor	2.1185333333333 ± 0.00033333333333333
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	17.16 ± 0.18 ms
Espin	3/2
nuclear quadrupole moment	0.0365 ± 0.0008
data de descobèrta	1956
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.266%

¹⁴B

mass number	14
neutron number	9
Relative Atomic Mass	14.02540401 ± 0.000022773 Da
g-factor	0.5925 ± 0.0025
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	12.36 ± 0.29 ms
Espin	2
nuclear quadrupole moment	0.0297 ± 0.0008
data de descobèrta	1966
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	6.04%
2n (2-neutron emission)

¹⁵B

mass number	15
neutron number	10
Relative Atomic Mass	15.031087023 ± 0.000022575 Da
g-factor	1.7726666666667 ± 0.01
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	10.18 ± 0.35 ms
Espin	3/2
nuclear quadrupole moment	0.0379 ± 0.0011
data de descobèrta	1966
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	98.7%
2n (2-neutron emission)	1.5%

¹⁶B

mass number	16
neutron number	11
Relative Atomic Mass	16.039841045 ± 0.000026373 Da
g-factor	0
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	0
nuclear quadrupole moment	0
data de descobèrta	2000
parity	-

decay mode	intensity
n (neutron emission)

¹⁷B

mass number	17
neutron number	12
Relative Atomic Mass	17.046931399 ± 0.000219114 Da
g-factor	1.7 ± 0.013333333333333
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	5.08 ± 0.05 ms
Espin	3/2
nuclear quadrupole moment	0.0385 ± 0.0015
data de descobèrta	1973
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	63%
2n (2-neutron emission)	12%
3n (3-neutron emission)	3.5%
4n	0.4%

¹⁸B

mass number	18
neutron number	13
Relative Atomic Mass	18.055601683 ± 0.00021918 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	2
nuclear quadrupole moment
data de descobèrta	2010
parity	-

decay mode	intensity
n (neutron emission)	100%

¹⁹B

mass number	19
neutron number	14
Relative Atomic Mass	19.064166 ± 0.000564 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida	2.92 ± 0.13 ms
Espin	3/2
nuclear quadrupole moment
data de descobèrta	1984
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	71%
2n (2-neutron emission)	17%
3n (3-neutron emission)	9.1%

²⁰B

mass number	20
neutron number	15
Relative Atomic Mass	20.074505644 ± 0.000586538 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	1
nuclear quadrupole moment
data de descobèrta	2018
parity	-

decay mode	intensity
n (neutron emission)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

²¹B

mass number	21
neutron number	16
Relative Atomic Mass	21.084147485 ± 0.00059975 Da
g-factor
natural abundance
Radioactivitat	☢️ radioactive element
Semivida
Espin	3/2
nuclear quadrupole moment
data de descobèrta	2018
parity	-

decay mode	intensity
2n (2-neutron emission)	100%

istòria

descobridor o inventaire	Sir H. Davy, J.L. Gay-Lussac, L.J. Thénard
luòc de descobèrta	England/France
data de descobèrta	1808
Etimologia	From Arabic and Persian words for borax.
pronunciation	BO-ron (English)

source

Abundance
Abundance in Earth's crust	10 mg/kg
natural abundance (Ocean)	4.44 mg/L
natural abundance (còs uman)	0.00007 %
natural abundance (meteoroid)	0.00016 %
natural abundance (Solelh)	0.0000002 %
Abundance in Universe	0.0000001 %

Nuclear Screening Constants

1	s	0.3205
2	p	2.5786
2	s	2.4238

Bòr on ChemicalAid

AGROVOC ID	c_1018
Australian Educational Vocabulary ID	scot/2755
Brockhaus Enzyklopädie online ID	bor-30
DSSTOX compound identifier	DTXCID503922
Encyclopædia Universalis ID	bore
French Vikidia ID	Bore
Great Russian Encyclopedia Online ID	1878022
HSDB ID	4482
InChI	InChI=1S/B
InChIKey	ZOXJGFHDIHLPTG-UHFFFAOYSA-N
Italian Vikidia ID	Boro
KBpedia ID	Boron
Latvian National Encyclopedia Online ID	89038
Mindat mineral ID	43412
Namuwiki ID	붕소
National Library of Israel J9U ID	987007283095205171
National Library of Latvia ID	000310483
OpenAlex ID	C501308230
Pixiv Encyclopedia ID	ホウ素
Probes And Drugs ID	PD143904
RxNorm CUI	1705
Spanish Vikidia ID	Boro
Store norske leksikon ID	bor_-_grunnstoff
UK Parliament thesaurus ID	8744
UMLS CUI	C0006030
USGS Thesaurus ID	1412
WordNet 3.1 Synset ID	14656049-n
YSO ID	7591
identificacion NK ČR	ph118964
identificant Art & Arquitectura Thesaurus	300264228
identificant BNF	12140810z
identificant ChEBI	27560
identificant ChemSpider	4575371
identificant DSSTOX de substància	DTXSID3023922
identificant Drangbank	11203
identificant Enciclopedia Treccani	boro
identificant Encyclopædia Britannica en linha	science/boron-chemical-element
identificant Freebase	/m/025svlc
identificant GND	4007709-3
identificant Gran Enciclopèdia Catalana	0085405
identificant KEGG	C06266
identificant MeSH	D001895
identificant NDF-RT	N0000148267
identificant NDL	00563492
identificant PSH	5791
identificant PubChem (CID)	5462311
identificant Quora d'un subjècte	Boron
identificant UNII	N9E3X5056Q
identificant bibliotèca del Congrès	sh85015871
identificant d'InfoCard ECHA	100.028.319
identificant del thesaurus de la BNCF	31249
numèro CAS	7440-42-8
numèro ZVG	8030
sens definit OmegaWiki	420

Bòr (B)

Proprietat Fisica

Chemical Property

other

Isotopes of Boron

6B

7B

8B

9B

10B

11B

12B

13B

14B

15B

16B

17B

18B

19B

20B

21B

istòria

source

Nuclear Screening Constants

⁶B

⁷B

⁸B

⁹B

¹⁰B

¹¹B

¹²B

¹³B

¹⁴B

¹⁵B

¹⁶B

¹⁷B

¹⁸B

¹⁹B

²⁰B

²¹B