Berilli (Be)

chemical element with symbol Be and atomic number 4

Atomic Number	4
Atomic Weight	9.0121831
Rhif màs	9

Group	2
Period	2
Block	s

Proton	4 p⁺
Niwtron	5 n⁰
Electron	4 e^-

Nodwedd Ffisegol

Atomic Radius	105 pm 219 pm
molar volume	5 cm³/mol
covalent radius	102 pm 90 pm 85 pm 115 pm 96 pm
Metallic Radius	89 pm 112 pm
ionic radius	16 pm 27 pm 45 pm
Crystal Radius	30 pm 41 pm 59 pm
Van der Waals radius	190 pm 153 pm 223 pm 153 pm 274.5 pm
density	1.85 g/cm³ 1,690 kg/m³

Nodwedd Gemegol

egni

proton affinity
electron affinity	-2.4 eV/particle
ionization energy	9.322699 eV/particle 18.211153 eV/particle 153.896198 eV/particle 217.7185766 eV/particle

enthalpy of vaporization	309 kJ/mol
enthalpy of fusion	12.21 kJ/mol
standard enthalpy of formation	324 kJ/mol
Electron

plisgyn yr electron	2, 2

valence electron	2 ⓘ

trefn yr electronnau	[He] 2s²ⓘ 1s² 2s²

Cyflwr ocsidiad	0, 1, 2
Electronegatifedd	9.323 eV/particle 0.144986 1.57
Electrophilicity Index	0.5110145863657444 eV/particle
cyflwr sylfaenol mater

cyflwr mater	Solid
gaseous state of matter
Boiling Point	2,741.15 K
Melting Point	1,560.15 K
critical pressure
critical temperature	5,205.15 K
triple point
appearance
lliw	Slate Gray #ff1493 #c2ff00 #c2ff00
appearance	white-gray metallic
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity	201 W/(m K)
thermal expansion	0.0000113 1/K
molar heat capacity	16.443 J/(mol K)
Specific Heat Capacity	1.825 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
dargludedd trydanol	25 MS/m
Gwrthedd	0.00000003999999999998 Ω*m
superconductivity	0.026 K
magnetism
type	diamagnetic
magnetic susceptibility (Mass)	-0.0000000126 m³/Kg
magnetic susceptibility (Molar)	-0.0000000001136 m³/mol
magnetic susceptibility (Volume)	-0.00002328
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal Structure	Simple Hexagonal (HEX)
lattice constant	2.29 Å
Lattice Angles	π/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness	600 MPa 5.5 MPa 1,670 MPa
bulk modulus	130 GPa
shear modulus	132 GPa
Young's modulus	287 GPa
Poisson's ratio	0.032
speed of sound	13,000 m/s
classification
Category	Alkaline earth metals, Alkaline earth metals
CAS Group	IIA
IUPAC Group	IIA
Glawe Number	77
Mendeleev Number	75
Pettifor Number	77
Geochemical Class	alkaline earth metal
Goldschmidt classification	litophile

other

Gas Basicity
polarizability	37.74 ± 0.03 a₀
C6 Dispersion Coefficient	227 a₀ 214 a₀
allotrope
Neutron cross section	0.0092
Neutron Mass Absorption	0.00003
quantum number	1S0
space group	194 (P63/mmc)

Isotopes of Beryllium

Stable Isotopes	1
Unstable Isotopes	11
Natural Isotopes	1

⁵Be

Rhif màs	5
neutron number	1
Relative Atomic Mass	5.03987 ± 0.00215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod
parity	+

decay mode	intensity
p (proton emission)

⁶Be

Rhif màs	6
neutron number	2
Relative Atomic Mass	6.019726409 ± 0.000005848 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	5 ± 0.3 zs
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1958
parity	+

decay mode	intensity
2p (2-proton emission)	100%

⁷Be

Rhif màs	7
neutron number	3
Relative Atomic Mass	7.016928714 ± 0.000000076 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	53.22 ± 0.06 d
spin	3/2
nuclear quadrupole moment
dyddiad darganfod	1938
parity	-

decay mode	intensity
ϵ (electron capture)	100%

⁸Be

Rhif màs	8
neutron number	4
Relative Atomic Mass	8.005305102 ± 0.000000037 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	81.9 ± 3.7 as
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1932
parity	+

decay mode	intensity
α (α emission)	100%

⁹Be

Rhif màs	9
neutron number	5
Relative Atomic Mass	9.012183062 ± 0.000000082 Da
g-factor	-0.78495333333333 ± 0.0000033333333333333
natural abundance	100
Dadfeilio ymbelydrol	stable isotope
Hanner oes	Not Radioactive ☢️
spin	3/2
nuclear quadrupole moment	0.0529 ± 0.0004
dyddiad darganfod	1921
parity	-

¹⁰Be

Rhif màs	10
neutron number	6
Relative Atomic Mass	10.013534692 ± 0.000000086 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.387 ± 0.012 My
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1935
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹¹Be

Rhif màs	11
neutron number	7
Relative Atomic Mass	11.02166108 ± 0.000000255 Da
g-factor	-3.3632 ± 0.0016
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	13.76 ± 0.07 s
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1958
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻α (β⁻-delayed α emission)	3.3%
B-p	0.0013%
β⁻ n (β⁻-delayed neutron emission)

¹²Be

Rhif màs	12
neutron number	8
Relative Atomic Mass	12.026922082 ± 0.000002048 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	21.46 ± 0.05 ms
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1966
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.5%

¹³Be

Rhif màs	13
neutron number	9
Relative Atomic Mass	13.036134506 ± 0.000010929 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1 ± 0.7 zs
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1983
parity	-

decay mode	intensity
n (neutron emission)

¹⁴Be

Rhif màs	14
neutron number	10
Relative Atomic Mass	14.04289292 ± 0.00014197 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	4.53 ± 0.27 ms
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1973
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	86%
2n (2-neutron emission)	5%
β⁻ t (β⁻-delayed triton emission)	0.02%
β⁻α (β⁻-delayed α emission)	0.004%

¹⁵Be

Rhif màs	15
neutron number	11
Relative Atomic Mass	15.053490215 ± 0.00017799 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	790 ± 270 ys
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	2013
parity	+

decay mode	intensity
n (neutron emission)	100%

¹⁶Be

Rhif màs	16
neutron number	12
Relative Atomic Mass	16.061672036 ± 0.00017799 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	650 ± 130 ys
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	2012
parity	+

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

hanes

darganfyddwr neu ddyfeisiwr	Fredrich Wöhler, A.A.Bussy
man darganfod	Germany/France
dyddiad darganfod	1798
geirdarddiad	Greek: beryllos, "beryl" (a mineral).
ynganiad	beh-RIL-i-em (Saesneg)

source

Abundance
Abundance in Earth's crust	2.8 mg/kg
natural abundance (cefnfor)	0.0000056 mg/L
natural abundance (corff dynol)	0.00000004 %
natural abundance (Awyrfaen)	0.0000029 %
natural abundance (Haul)	0.00000001 %
Abundance in Universe	0.0000001 %

Nuclear Screening Constants

1	s	0.3152
2	s	2.088

Berilli on ChemicalAid

Australian Educational Vocabulary ID	scot/2378
Brockhaus Enzyklopädie online ID	beryllium
CAB ID	18807
CA PROP 65 ID	beryllium
ChEBI ID	33783
ChemSpider ID	4573986
DSSTOX compound identifier	DTXCID90875623
DSSTox substance ID	DTXSID4023913
Den Store Danske ID	beryllium
ECHA Substance Infocard ID	100.028.318
English Vikidia ID	Beryllium
French Vikidia ID	Béryllium
GND	4144824-8
Golden ID	Beryllium-KNWM
Great Russian Encyclopedia Online ID	1860218
InChI	InChI=1S/Be
InChIKey	ATBAMAFKBVZNFJ-UHFFFAOYSA-N
Italian Vikidia ID	Berillio
Krugosvet article	nauka_i_tehnika/himiya/BERILLI.html
Latvian National Encyclopedia Online ID	88301
Mindat mineral ID	52430
Namuwiki ID	베릴륨
National Library of Israel J9U ID	987007284771305171
OmegaWiki Defined Meaning	336
OpenAlex ID	C506630978
PM20 ware ID	142103
PubChem CID	5460467
Rhif Cofrestru CAS	7440-41-7
RxNorm ID	1310252
Spanish Vikidia ID	Berilio
Store medisinske leksikon ID	beryllium
Store norske leksikon ID	beryllium
UNII	OW5102UV6N
USGS Thesaurus ID	1406
WordNet 3.1 Synset ID	14655473-n
ZVG number	8020
dynodwr BNE	XX543120
dynodwr BnF	12218693d
dynodwr Encyclopædia Britannica Online	science/beryl
dynodwr Encyclopædia Britannica Online	science/beryllium
dynodwr Encyclopædia Universalis	beryllium
dynodwr Freebase	/m/025sq7x
dynodwr Gran Enciclopèdia Catalana	0008470
dynodwr HCIS	495
dynodwr HSDB	512
dynodwr ICSC	0226
dynodwr KBpedia	Beryllium
dynodwr LCAuth	sh85013403
dynodwr MeSH	D001608
dynodwr NDL	00560614
dynodwr NE.se	beryllium
dynodwr NKC	ph150532
dynodwr PSH	5750
dynodwr Quora	Beryllium
dynodwr Treccani	berillio
dynodwr YSO	15819
dynodwr thesawrws Senedd y DU	8639
dynodwr yn thesawrws y BNCF	30890

Berilli (Be)

Nodwedd Ffisegol

Nodwedd Gemegol

other

Isotopes of Beryllium

5Be

6Be

7Be

8Be

9Be

10Be

11Be

12Be

13Be

14Be

15Be

16Be

hanes

source

Nuclear Screening Constants

⁵Be

⁶Be

⁷Be

⁸Be

⁹Be

¹⁰Be

¹¹Be

¹²Be

¹³Be

¹⁴Be

¹⁵Be

¹⁶Be