Bor

Bor (B)

chemical element with symbol B and atomic number 5
Atomic Number5
Atomic Weight10.81
Numri i masës11
Group13
Period2
Blockp
protoni5 p+
neutroni6 n0
elektroni5 e-
Animated Bohr model of B (Bor)

Tipar Fizik

Atomic Radius
85 pm
molar volume
covalent radius
85 pm
Metallic Radius
80 pm
ionic radius
1 pm
Crystal Radius
15 pm
Van der Waals radius
192 pm
density
2,34 g/cm³
Atomic Radii Of The Elements: Bor0102030405060708090100110120130140150160170180190200pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energjia
proton affinity
electron affinity
0,279723 eV/particle
ionization energy
8,298019 eV/particle
ionization energy of B (Bor)
enthalpy of vaporization
504,5 kJ/mol
enthalpy of fusion
23,6 kJ/mol
standard enthalpy of formation
565 kJ/mol
elektroni
electron shell2, 3
Bohr model: B (Bor)
valence electron3
Lewis structure: B (Bor)
konfigurimi i elektronit[He] 2s2 2p1
1s2 2s2 2p1
Enhanced Bohr model of B (Bor)
Orbital Diagram of B (Bor)
oxidation number-5, -1, 0, 1, 2, 3
Elektronegativiteti
2.04
Electrophilicity Index
1,1470276511768214 eV/particle
fundamental state of matter
gjendja agregate e materiesSolid
gaseous state of matter
Boiling Point
4 273,15 K
Melting Point
2 350,15 K
critical pressure
critical temperature
triple point
appearance
Ngjyra
Black
appearanceblack-brown
refractive index
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
electrical conductivity
0,0000000001 MS/m
electrical resistivity
10 000 m Ω
Superpërcjellshmëria
Magnetizimi
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
strukturë
Crystal StructureSimple Trigonal (TET)
lattice constant
8,73 Å
Lattice Angles1.01334, 1.01334, 1.01334
mechanical property
hardness
9,3 MPa
bulk modulus
320 GPa
shear modulus
Young's modulus
Poisson's ratio
Shpejtësia e zërit
16 200 m/s
klasifikim
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
numër kuantik2P1/2
space group166 (R_3m)

Isotopes of Boron

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

6B

Numri i masës6
numri i neutroneve1
relative atomic mass
6,0508 ± 0,00215 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini2
nuclear quadrupole moment
koha e zbulimit apo shpikjes
parity-

decay modeintensitet
2p (2-proton emission)

7B

Numri i masës7
numri i neutroneve2
relative atomic mass
7,029712 ± 0,000027 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
570 ± 14 ys
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1967
parity-

decay modeintensitet
p (proton emission)100%

8B

Numri i masës8
numri i neutroneve3
relative atomic mass
8,024607315 ± 0,000001073 Da
g-factor
0,51775 ± 0,00015
natural abundance
Radioaktivitet☢️ radioactive element
half-life
771,9 ± 0,9 ms
Spini2
nuclear quadrupole moment
0,0643 ± 0,0014
koha e zbulimit apo shpikjes1950
parity+

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

9B

Numri i masës9
numri i neutroneve4
relative atomic mass
9,013329645 ± 0,000000969 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
800 ± 300 zs
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1940
parity-

decay modeintensitet
p (proton emission)100%

10B

Numri i masës10
numri i neutroneve5
relative atomic mass
10,012936862 ± 0,000000016 Da
g-factor
0,60015453333333 ± 0,00000026666666666667
natural abundance
19,65 ± 0,44
Radioaktivitetstable isotope
half-lifeNot Radioactive ☢️
Spini3
nuclear quadrupole moment
0,0846 ± 0,0002
koha e zbulimit apo shpikjes1920
parity+

11B

Numri i masës11
numri i neutroneve6
relative atomic mass
11,009305166 ± 0,000000013 Da
g-factor
1,792252 ± 0,00000066666666666667
natural abundance
80,35 ± 0,44
Radioaktivitetstable isotope
half-lifeNot Radioactive ☢️
Spini3/2
nuclear quadrupole moment
0,04059 ± 0,0001
koha e zbulimit apo shpikjes1920
parity-

12B

Numri i masës12
numri i neutroneve7
relative atomic mass
12,014352638 ± 0,000001418 Da
g-factor
1,003 ± 0,001
natural abundance
Radioaktivitet☢️ radioactive element
half-life
20,2 ± 0,02 ms
Spini1
nuclear quadrupole moment
0,0132 ± 0,0003
koha e zbulimit apo shpikjes1935
parity+

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

13B

Numri i masës13
numri i neutroneve8
relative atomic mass
13,017779981 ± 0,000001073 Da
g-factor
2,1185333333333 ± 0,00033333333333333
natural abundance
Radioaktivitet☢️ radioactive element
half-life
17,16 ± 0,18 ms
Spini3/2
nuclear quadrupole moment
0,0365 ± 0,0008
koha e zbulimit apo shpikjes1956
parity-

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

14B

Numri i masës14
numri i neutroneve9
relative atomic mass
14,02540401 ± 0,000022773 Da
g-factor
0,5925 ± 0,0025
natural abundance
Radioaktivitet☢️ radioactive element
half-life
12,36 ± 0,29 ms
Spini2
nuclear quadrupole moment
0,0297 ± 0,0008
koha e zbulimit apo shpikjes1966
parity-

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

15B

Numri i masës15
numri i neutroneve10
relative atomic mass
15,031087023 ± 0,000022575 Da
g-factor
1,7726666666667 ± 0,01
natural abundance
Radioaktivitet☢️ radioactive element
half-life
10,18 ± 0,35 ms
Spini3/2
nuclear quadrupole moment
0,0379 ± 0,0011
koha e zbulimit apo shpikjes1966
parity-

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

16B

Numri i masës16
numri i neutroneve11
relative atomic mass
16,039841045 ± 0,000026373 Da
g-factor
0
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini0
nuclear quadrupole moment
0
koha e zbulimit apo shpikjes2000
parity-

decay modeintensitet
n (neutron emission)

17B

Numri i masës17
numri i neutroneve12
relative atomic mass
17,046931399 ± 0,000219114 Da
g-factor
1,7 ± 0,013333333333333
natural abundance
Radioaktivitet☢️ radioactive element
half-life
5,08 ± 0,05 ms
Spini3/2
nuclear quadrupole moment
0,0385 ± 0,0015
koha e zbulimit apo shpikjes1973
parity-

decay modeintensitet
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

Numri i masës18
numri i neutroneve13
relative atomic mass
18,055601683 ± 0,00021918 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini2
nuclear quadrupole moment
koha e zbulimit apo shpikjes2010
parity-

decay modeintensitet
n (neutron emission)100%

19B

Numri i masës19
numri i neutroneve14
relative atomic mass
19,064166 ± 0,000564 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
2,92 ± 0,13 ms
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes1984
parity-

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

20B

Numri i masës20
numri i neutroneve15
relative atomic mass
20,074505644 ± 0,000586538 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini1
nuclear quadrupole moment
koha e zbulimit apo shpikjes2018
parity-

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

21B

Numri i masës21
numri i neutroneve16
relative atomic mass
21,084147485 ± 0,00059975 Da
g-factor
natural abundance
Radioaktivitet☢️ radioactive element
half-life
Spini3/2
nuclear quadrupole moment
koha e zbulimit apo shpikjes2018
parity-

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

historia

zbuluesSir H. Davy, J.L. Gay-Lussac, L.J. Thénard
vendndodhja e zbulimitEngland/France
koha e zbulimit apo shpikjes1808
EtimologjiaFrom Arabic and Persian words for borax.
pronunciationBO-ron (anglisht)

burim

Abundance
Abundance in Earth's crust
natural abundance (Oqeani)
4,44 mg/L
natural abundance (Trupi i njeriut)
0,00007 %
natural abundance (meteoroid)
0,00016 %
natural abundance (Diell)
0,0000002 %
Abundance in Universe
0,0000001 %

Nuclear Screening Constants

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