Boor (B)

chemical element with symbol B and atomic number 5

Atomic Number	5
Atomic Weight	10.81
massiarv	11

Group	13
Period	2
Block	p

prooton	5 p⁺
neutron	6 n⁰
elektron	5 e^-

Animated Bohri aatomiteooria of B (Boor)

Füüsikalised Omadused

Aatomiraadius	85 pm 205 pm
molaarruumala	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
Van der Waals radius	180 pm 402 pm 192 pm 215 pm 192 pm 408,3 pm
density	2,34 g/cm³ 2 080 kg/m³

Keemilised Omadused

{ERROR}

energia

proton affinity
Elektronafiinsus	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

aurustumissoojus	504,5 kJ/mol
sulamissoojus	23,6 kJ/mol
standard enthalpy of formation	565 kJ/mol
elektron

elektronkiht	2, 3

valentselektron	3 ⓘ

elektronkonfiguratsioon	[He] 2s² 2p¹ⓘ 1s² 2s² 2p¹

oksüdatsiooniaste	-5, -1, 0, 1, 2, 3
elektronegatiivsus	12,13 eV/particle 0.184886 2.04
Electrophilicity Index	1,1470276511768214 eV/particle
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point	4 273,15 K
Melting Point	2 350,15 K
critical pressure
critical temperature
kolmikpunkt
Välimus
värvus	Black #00ff00 #ffb5b5 #ffb5b5
Välimus	black-brown
Murdumisnäitaja
thermodynamic material property
Thermal Conductivity	27,4 W/(m K)
soojuspaisumine	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
Elektrijuhtivus	0,0000000001 MS/m
Eritakistus	10 000 Ω*m
Ülijuhtivus
Magnetism
type	diamagnetic
Magnetiline vastuvõtlikkus (Mass)	−0,0000000087 m³/Kg
Magnetiline vastuvõtlikkus (Molar)	−0,0000000000941 m³/mol
Magnetiline vastuvõtlikkus (Volume)	−0,0000214
magnetic ordering
Curie punkt
Néel temperature
struktuur
Crystal Structure	{ERROR}
lattice constant	8,73 Å
Lattice Angles	1.01334, 1.01334, 1.01334
mechanical property
kõvadus	9,3 MPa 49 000 MPa
Ruumpaisumismoodul	320 GPa
Nihkeelastsusmoodul
Normaalelastsusmoodul
Poissoni tegur
heli kiirus	16 200 m/s
Klassifitseerimine
Category	Actinides, Metalloids
CAS Group	IIIB
IUPAC Group	IIIA
Glawe Number	86
Mendeleev Number	81
Pettifor Number	86
Geochemical Class
Goldschmidt classification	litophile

teine

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
Kvantarv	2P1/2
space group	166 (R_3m)

Isotopes of Boron

Stable Isotopes	2
Unstable Isotopes	14
Natural Isotopes	2

⁶B

massiarv	6
neutron number	1
Relative Atomic Mass	6,0508 ± 0,00215 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg
spinn	2
nuclear quadrupole moment
avastamise aeg
parity	-

decay mode	Intensiivsus
2p (2-proton emission)

⁷B

massiarv	7
neutron number	2
Relative Atomic Mass	7,029712 ± 0,000027 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	570 ± 14 ys
spinn	3/2
nuclear quadrupole moment
avastamise aeg	1967
parity	-

decay mode	Intensiivsus
p (proton emission)	100%

⁸B

massiarv	8
neutron number	3
Relative Atomic Mass	8,024607315 ± 0,000001073 Da
g-factor	0,51775 ± 0,00015
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	771,9 ± 0,9 ms
spinn	2
nuclear quadrupole moment	0,0643 ± 0,0014
avastamise aeg	1950
parity	+

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

⁹B

massiarv	9
neutron number	4
Relative Atomic Mass	9,013329645 ± 0,000000969 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	800 ± 300 zs
spinn	3/2
nuclear quadrupole moment
avastamise aeg	1940
parity	-

decay mode	Intensiivsus
p (proton emission)	100%

¹⁰B

massiarv	10
neutron number	5
Relative Atomic Mass	10,012936862 ± 0,000000016 Da
g-factor	0,60015453333333 ± 0,00000026666666666667
natural abundance	19,65 ± 0,44
radioaktiivsus	Stabiilne isotoop
Poolestusaeg	Not Radioactive ☢️
spinn	3
nuclear quadrupole moment	0,0846 ± 0,0002
avastamise aeg	1920
parity	+

¹¹B

massiarv	11
neutron number	6
Relative Atomic Mass	11,009305166 ± 0,000000013 Da
g-factor	1,792252 ± 0,00000066666666666667
natural abundance	80,35 ± 0,44
radioaktiivsus	Stabiilne isotoop
Poolestusaeg	Not Radioactive ☢️
spinn	3/2
nuclear quadrupole moment	0,04059 ± 0,0001
avastamise aeg	1920
parity	-

¹²B

massiarv	12
neutron number	7
Relative Atomic Mass	12,014352638 ± 0,000001418 Da
g-factor	1,003 ± 0,001
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	20,2 ± 0,02 ms
spinn	1
nuclear quadrupole moment	0,0132 ± 0,0003
avastamise aeg	1935
parity	+

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

¹³B

massiarv	13
neutron number	8
Relative Atomic Mass	13,017779981 ± 0,000001073 Da
g-factor	2,1185333333333 ± 0,00033333333333333
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	17,16 ± 0,18 ms
spinn	3/2
nuclear quadrupole moment	0,0365 ± 0,0008
avastamise aeg	1956
parity	-

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

¹⁴B

massiarv	14
neutron number	9
Relative Atomic Mass	14,02540401 ± 0,000022773 Da
g-factor	0,5925 ± 0,0025
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	12,36 ± 0,29 ms
spinn	2
nuclear quadrupole moment	0,0297 ± 0,0008
avastamise aeg	1966
parity	-

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

¹⁵B

massiarv	15
neutron number	10
Relative Atomic Mass	15,031087023 ± 0,000022575 Da
g-factor	1,7726666666667 ± 0,01
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	10,18 ± 0,35 ms
spinn	3/2
nuclear quadrupole moment	0,0379 ± 0,0011
avastamise aeg	1966
parity	-

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

¹⁶B

massiarv	16
neutron number	11
Relative Atomic Mass	16,039841045 ± 0,000026373 Da
g-factor	0
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg
spinn	0
nuclear quadrupole moment	0
avastamise aeg	2000
parity	-

decay mode	Intensiivsus
n (neutron emission)

¹⁷B

massiarv	17
neutron number	12
Relative Atomic Mass	17,046931399 ± 0,000219114 Da
g-factor	1,7 ± 0,013333333333333
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	5,08 ± 0,05 ms
spinn	3/2
nuclear quadrupole moment	0,0385 ± 0,0015
avastamise aeg	1973
parity	-

decay mode	Intensiivsus
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

massiarv	18
neutron number	13
Relative Atomic Mass	18,055601683 ± 0,00021918 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg
spinn	2
nuclear quadrupole moment
avastamise aeg	2010
parity	-

decay mode	Intensiivsus
n (neutron emission)	100%

¹⁹B

massiarv	19
neutron number	14
Relative Atomic Mass	19,064166 ± 0,000564 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg	2,92 ± 0,13 ms
spinn	3/2
nuclear quadrupole moment
avastamise aeg	1984
parity	-

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

²⁰B

massiarv	20
neutron number	15
Relative Atomic Mass	20,074505644 ± 0,000586538 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg
spinn	1
nuclear quadrupole moment
avastamise aeg	2018
parity	-

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

²¹B

massiarv	21
neutron number	16
Relative Atomic Mass	21,084147485 ± 0,00059975 Da
g-factor
natural abundance
radioaktiivsus	☢️ radioactive element
Poolestusaeg
spinn	3/2
nuclear quadrupole moment
avastamise aeg	2018
parity	-

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

ajalugu

leiutaja või avastaja	Sir H. Davy, J.L. Gay-Lussac, L.J. Thénard
location of discovery	England/France
avastamise aeg	1808
etümoloogia	From Arabic and Persian words for borax.
pronunciation	BO-ron (inglise)

allikas

Abundance
Abundance in Earth's crust	10 mg/kg
natural abundance (ookean)	4,44 mg/L
natural abundance (Inimkeha)	0,00007 %
natural abundance (meteoorkeha)	0,00016 %
natural abundance (Päike)	0,0000002 %
Abundance in Universe	0,0000001 %

Nuclear Screening Constants

1	s	0.3205
2	p	2.5786
2	s	2.4238

Boor on ChemicalAid

Boor (B)

Füüsikalised Omadused

Keemilised Omadused

teine

Isotopes of Boron

6B

7B

8B

9B

10B

11B

12B

13B

14B

15B

16B

17B

18B

19B

20B

21B

ajalugu

allikas

Nuclear Screening Constants

⁶B

⁷B

⁸B

⁹B

¹⁰B

¹¹B

¹²B

¹³B

¹⁴B

¹⁵B

¹⁶B

¹⁷B

¹⁸B

¹⁹B

²⁰B

²¹B