Boor

Boor (B)

chemical element with symbol B and atomic number 5
Atomic Number5
Atomic Weight10.81
Massagetal11
Group13
Period2
Blockp
proton5 p+
neutron6 n0
elektron5 e-
Animated Bohr model of B (Boor)

Physical Property

Atoomradius
85 pm
molar volume
Covalent Radius
85 pm
Metallic Radius
80 pm
Ioonradius
1 pm
Crystal Radius
15 pm
Van der Waals radius
192 pm
density
2,34 g/cm³
Atomic Radii Of The Elements: Boor020406080100120140160180200pmAtoomradiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energie
proton affinity
electron affinity
0,279723 eV/particle
ionization energy
8,298019 eV/particle
ionization energy of B (Boor)
Verdampingswarmte
504,5 kJ/mol
smeltingswarmte
23,6 kJ/mol
Vormingsentalpie
565 kJ/mol
elektron
Elektronskil2, 3
Bohr model: B (Boor)
Valenselektrone3
Lewisteorie: B (Boor)
elektronkonfigurasie[He] 2s2 2p1
1s2 2s2 2p1
Enhanced Bohr model of B (Boor)
Orbital Diagram of B (Boor)
Oksidasietoestand-5, -1, 0, 1, 2, 3
Elektronegatiwiteit
2.04
Electrophilicity Index
1,1470276511768214 eV/particle
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
4 273,15 K
Melting Point
2 350,15 K
critical pressure
critical temperature
triple point
appearance
kleur
Black
appearanceblack-brown
Brekingsindeks
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
typeInsulator
Geleidingsvermoë
0,0000000001 MS/m
Elektriese resistiwiteit
10 000 m Ω
superconductivity
Magnetisme
typediamagnetic
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
structure
Crystal StructureSimple Trigonal (TET)
lattice constant
8,73 Å
Lattice Angles1.01334, 1.01334, 1.01334
mechanical property
hardness
9,3 MPa
Massamodulus
320 GPa
Skuifmodulus
Young se modulus
Poisson se verhouding
Spoed van klank
16 200 m/s
classification
CategoryMetalloids, Metalloids
CAS GroupIIIB
IUPAC GroupIIIA
Glawe Number86
Mendeleev Number81
Pettifor Number86
Geochemical Class
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
20,5 ± 0,1 a₀
C6 Dispersion Coefficient
99,5 a₀
allotropeAlpha Rhombohedral Boron, Beta Rhombohedral Boron, Alpha Tetragonal Boron
Neutron cross section
760
Neutron Mass Absorption
2,4
quantum number2P1/2
Ruimtegroep166 (R_3m)

Isotopes of Boron

Stable Isotopes2
Unstable Isotopes14
Natural Isotopes2
Isotopic Composition1180.35%1180.35%1019.65%1019.65%

6B

Massagetal6
neutron number1
relative atomic mass
6,0508 ± 0,00215 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin2
nuclear quadrupole moment
ontdekkingsdatum
parity-

decay modeintensity
2p (2-proton emission)

7B

Massagetal7
neutron number2
relative atomic mass
7,029712 ± 0,000027 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
570 ± 14 ys
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1967
parity-

decay modeintensity
p (proton emission)100%

8B

Massagetal8
neutron number3
relative atomic mass
8,024607315 ± 0,000001073 Da
g-factor
0,51775 ± 0,00015
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
771,9 ± 0,9 ms
spin2
nuclear quadrupole moment
0,0643 ± 0,0014
ontdekkingsdatum1950
parity+

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

9B

Massagetal9
neutron number4
relative atomic mass
9,013329645 ± 0,000000969 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
800 ± 300 zs
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1940
parity-

decay modeintensity
p (proton emission)100%

10B

Massagetal10
neutron number5
relative atomic mass
10,012936862 ± 0,000000016 Da
g-factor
0,60015453333333 ± 0,00000026666666666667
natural abundance
19,65 ± 0,44
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin3
nuclear quadrupole moment
0,0846 ± 0,0002
ontdekkingsdatum1920
parity+

11B

Massagetal11
neutron number6
relative atomic mass
11,009305166 ± 0,000000013 Da
g-factor
1,792252 ± 0,00000066666666666667
natural abundance
80,35 ± 0,44
radioaktiwiteitStabiele isotoop
HalfleeftydNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0,04059 ± 0,0001
ontdekkingsdatum1920
parity-

12B

Massagetal12
neutron number7
relative atomic mass
12,014352638 ± 0,000001418 Da
g-factor
1,003 ± 0,001
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
20,2 ± 0,02 ms
spin1
nuclear quadrupole moment
0,0132 ± 0,0003
ontdekkingsdatum1935
parity+

decay modeintensity
β (β decay)100%
βα (β-delayed α emission)0.6%

13B

Massagetal13
neutron number8
relative atomic mass
13,017779981 ± 0,000001073 Da
g-factor
2,1185333333333 ± 0,00033333333333333
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
17,16 ± 0,18 ms
spin3/2
nuclear quadrupole moment
0,0365 ± 0,0008
ontdekkingsdatum1956
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.266%

14B

Massagetal14
neutron number9
relative atomic mass
14,02540401 ± 0,000022773 Da
g-factor
0,5925 ± 0,0025
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
12,36 ± 0,29 ms
spin2
nuclear quadrupole moment
0,0297 ± 0,0008
ontdekkingsdatum1966
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)6.04%
2n (2-neutron emission)

15B

Massagetal15
neutron number10
relative atomic mass
15,031087023 ± 0,000022575 Da
g-factor
1,7726666666667 ± 0,01
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
10,18 ± 0,35 ms
spin3/2
nuclear quadrupole moment
0,0379 ± 0,0011
ontdekkingsdatum1966
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)98.7%
2n (2-neutron emission)1.5%

16B

Massagetal16
neutron number11
relative atomic mass
16,039841045 ± 0,000026373 Da
g-factor
0
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin0
nuclear quadrupole moment
0
ontdekkingsdatum2000
parity-

decay modeintensity
n (neutron emission)

17B

Massagetal17
neutron number12
relative atomic mass
17,046931399 ± 0,000219114 Da
g-factor
1,7 ± 0,013333333333333
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
5,08 ± 0,05 ms
spin3/2
nuclear quadrupole moment
0,0385 ± 0,0015
ontdekkingsdatum1973
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)63%
2n (2-neutron emission)12%
3n (3-neutron emission)3.5%
4n0.4%

18B

Massagetal18
neutron number13
relative atomic mass
18,055601683 ± 0,00021918 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin2
nuclear quadrupole moment
ontdekkingsdatum2010
parity-

decay modeintensity
n (neutron emission)100%

19B

Massagetal19
neutron number14
relative atomic mass
19,064166 ± 0,000564 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
2,92 ± 0,13 ms
spin3/2
nuclear quadrupole moment
ontdekkingsdatum1984
parity-

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

20B

Massagetal20
neutron number15
relative atomic mass
20,074505644 ± 0,000586538 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin1
nuclear quadrupole moment
ontdekkingsdatum2018
parity-

decay modeintensity
n (neutron emission)100%
β n (β-delayed neutron emission)
2n (2-neutron emission)

21B

Massagetal21
neutron number16
relative atomic mass
21,084147485 ± 0,00059975 Da
g-factor
natural abundance
radioaktiwiteit☢️ radioactive element
Halfleeftyd
spin3/2
nuclear quadrupole moment
ontdekkingsdatum2018
parity-

decay modeintensity
2n (2-neutron emission)100%
Boron
Electron shell 005 Boron

geskiedenis

Ontdek deurSir H. Davy, J.L. Gay-Lussac, L.J. Thénard
ligging van ontdekkingEngland/France
ontdekkingsdatum1808
etimologieFrom Arabic and Persian words for borax.
uitspraakBO-ron (Engels)

source

Abundance
Abundance in Earth's crust
natural abundance (oseaan)
4,44 mg/L
natural abundance (human body)
0,00007 %
natural abundance (Meteoroïde)
0,00016 %
natural abundance (Son)
0,0000002 %
Abundance in Universe
0,0000001 %

Nuclear Screening Constants

1s0.3205
2p2.5786
2s2.4238