Dubni (Db)

chemical element with the atomic number of 105

Atomic Number	105
Atomic Weight	268
Rhif màs	255

Group	5
Period	7
Block	d

Proton	105 p⁺
Niwtron	150 n⁰
Electron	105 e^-

Nodwedd Ffisegol

Atomic Radius
molar volume
covalent radius	149 pm 136 pm 126 pm
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
density	29.3 g/cm³

Nodwedd Gemegol

egni

proton affinity
electron affinity
ionization energy	6.8 eV/particle 14 eV/particle 23.1 eV/particle 33 eV/particle 43 eV/particle 86 eV/particle 98.9 eV/particle 126 eV/particle 145 eV/particle 172 eV/particle 196 eV/particle 220.9 eV/particle 254 eV/particle 274 eV/particle 307 eV/particle 838 eV/particle 872 eV/particle 908 eV/particle 948 eV/particle 985 eV/particle 1,022 eV/particle 1,089 eV/particle 1,126 eV/particle 1,168 eV/particle 1,207 eV/particle 3,975 eV/particle 4,057 eV/particle 4,145 eV/particle 4,237 eV/particle 4,326 eV/particle 4,411 eV/particle 4,620 eV/particle 4,710 eV/particle 4,810 eV/particle 4,900 eV/particle 5,260 eV/particle 5,350 eV/particle 5,450 eV/particle 5,530 eV/particle 6,280 eV/particle 6,380 eV/particle 6,650 eV/particle 6,760 eV/particle 10,420 eV/particle 10,610 eV/particle 10,820 eV/particle 11,040 eV/particle 11,240 eV/particle 11,440 eV/particle 12,040 eV/particle 12,250 eV/particle 12,480 eV/particle 12,700 eV/particle 13,300 eV/particle 13,500 eV/particle 13,700 eV/particle 13,900 eV/particle 16,200 eV/particle 16,400 eV/particle 16,900 eV/particle 17,100 eV/particle 33,800 eV/particle 34,300 eV/particle 34,800 eV/particle 35,300 eV/particle 43,800 eV/particle 44,500 eV/particle 45,400 eV/particle 181,444 eV/particle

enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
Electron

plisgyn yr electron	2, 8, 18, 32, 32, 11, 2

valence electron	2 ⓘ

trefn yr electronnau	[Rn] 5f¹⁴ 6d³ 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹⁴ 6d³ 7s²

Cyflwr ocsidiad	5
Electronegatifedd
Electrophilicity Index
cyflwr sylfaenol mater

cyflwr mater	Solid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
triple point
appearance
lliw	Colorless #d1004f
appearance
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
dargludedd trydanol
Gwrthedd
superconductivity
magnetism
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal Structure	()
lattice constant
Lattice Angles
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
Category	Transition metals, Transition metals
CAS Group	VA
IUPAC Group	VB
Glawe Number
Mendeleev Number	50
Pettifor Number
Geochemical Class
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	42 ± 4 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
Neutron Mass Absorption
quantum number	4F3/2
space group	()

Isotopes of Dubnium

Stable Isotopes	0
Unstable Isotopes	16
Natural Isotopes	0

²⁵⁵Db

Rhif màs	255
neutron number	150
Relative Atomic Mass	255.106919 ± 0.000304 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	54 ms
spin	9/2
nuclear quadrupole moment
dyddiad darganfod	1976
parity	+

decay mode	intensity
SF (spontaneous fission)	67%
α (α emission)

²⁵⁶Db

Rhif màs	256
neutron number	151
Relative Atomic Mass	256.107674 ± 0.000201 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.7 ± 0.4 s
spin	9
nuclear quadrupole moment
dyddiad darganfod	2001
parity	-

decay mode	intensity
α (α emission)	70%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	30%
SF (spontaneous fission)

²⁵⁷Db

Rhif màs	257
neutron number	152
Relative Atomic Mass	257.107520042 ± 0.000176741 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2.3 ± 0.2 s
spin	9/2
nuclear quadrupole moment
dyddiad darganfod	1985
parity	+

decay mode	intensity
α (α emission)	94%
SF (spontaneous fission)	6%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁵⁸Db

Rhif màs	258
neutron number	153
Relative Atomic Mass	258.108972995 ± 0.000098613 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2.17 ± 0.36 s
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1985
parity	-

decay mode	intensity
α (α emission)	64%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	36%

²⁵⁹Db

Rhif màs	259
neutron number	154
Relative Atomic Mass	259.109491859 ± 0.000060854 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	510 ± 160 ms
spin	9/2
nuclear quadrupole moment
dyddiad darganfod	2001
parity	+

decay mode	intensity
α (α emission)	100%

²⁶⁰Db

Rhif màs	260
neutron number	155
Relative Atomic Mass	260.111297 ± 0.0001 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.52 ± 0.13 s
spin
nuclear quadrupole moment
dyddiad darganfod	1970
parity

decay mode	intensity
α (α emission)	90.4%
SF (spontaneous fission)	9.6%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁶¹Db

Rhif màs	261
neutron number	156
Relative Atomic Mass	261.111979 ± 0.000118 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	4.7 ± 1 s
spin	9/2
nuclear quadrupole moment
dyddiad darganfod	1970
parity	+

decay mode	intensity
SF (spontaneous fission)	73%
α (α emission)	27%

²⁶²Db

Rhif màs	262
neutron number	157
Relative Atomic Mass	262.114067 ± 0.000154 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	34 ± 4 s
spin
nuclear quadrupole moment
dyddiad darganfod	1971
parity

decay mode	intensity
SF (spontaneous fission)	52%
α (α emission)	48%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁶³Db

Rhif màs	263
neutron number	158
Relative Atomic Mass	263.114987 ± 0.00018 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	29 ± 9 s
spin	9/2
nuclear quadrupole moment
dyddiad darganfod	1992
parity	+

decay mode	intensity
SF (spontaneous fission)	56%
α (α emission)	37%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	6.9%

²⁶⁴Db

Rhif màs	264
neutron number	159
Relative Atomic Mass	264.117297 ± 0.000253 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod
parity

decay mode	intensity
α (α emission)

²⁶⁵Db

Rhif màs	265
neutron number	160
Relative Atomic Mass	265.1185 ± 0.00024 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	9/2
nuclear quadrupole moment
dyddiad darganfod
parity	+

decay mode	intensity
α (α emission)

²⁶⁶Db

Rhif màs	266
neutron number	161
Relative Atomic Mass	266.121032 ± 0.000304 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	80 ± 70 m
spin
nuclear quadrupole moment
dyddiad darganfod	2007
parity

decay mode	intensity
α (α emission)
SF (spontaneous fission)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁶⁷Db

Rhif màs	267
neutron number	162
Relative Atomic Mass	267.122399 ± 0.000402 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2 ± 1.1 h
spin	9/2
nuclear quadrupole moment
dyddiad darganfod	2004
parity	+

decay mode	intensity
SF (spontaneous fission)	100%

²⁶⁸Db

Rhif màs	268
neutron number	163
Relative Atomic Mass	268.125669 ± 0.000568 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	29 ± 3 h
spin
nuclear quadrupole moment
dyddiad darganfod	2004
parity

decay mode	intensity
SF (spontaneous fission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)

²⁶⁹Db

Rhif màs	269
neutron number	164
Relative Atomic Mass	269.127911 ± 0.000669 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	9/2
nuclear quadrupole moment
dyddiad darganfod
parity	+

decay mode	intensity
α (α emission)
SF (spontaneous fission)

²⁷⁰Db

Rhif màs	270
neutron number	165
Relative Atomic Mass	270.131399 ± 0.000617 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.7 ± 1 h
spin
nuclear quadrupole moment
dyddiad darganfod	2010
parity

decay mode	intensity
SF (spontaneous fission)	87%
α (α emission)	13%

hanes

darganfyddwr neu ddyfeisiwr	A. Ghiorso, et al
man darganfod	United States
dyddiad darganfod	1970
geirdarddiad	Named after the city of Dubna, the site of the JINR.
ynganiad	HA-ni-em (Saesneg)

source

Abundance
Abundance in Earth's crust
natural abundance (cefnfor)
natural abundance (corff dynol)	0 %
natural abundance (Awyrfaen)	0 %
natural abundance (Haul)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Dubni on ChemicalAid

Australian Educational Vocabulary ID	scot/3514
DSSTOX compound identifier	DTXCID801323011
DSSTox substance ID	DTXSID30893063
Den Store Danske ID	dubnium
ECHA Substance Infocard ID	100.126.367
Elhuyar ZTH ID	064402
Encyclopedia of China (Third Edition) ID	185643
GND	4293095-9
Great Russian Encyclopedia Online ID	1969523
OmegaWiki Defined Meaning	157650
Rhif Cofrestru CAS	53850-35-4
Store norske leksikon ID	dubnium
USGS Thesaurus ID	1442
dynodwr Encyclopædia Britannica Online	science/dubnium
dynodwr Freebase	/m/0274b33
dynodwr Gran Enciclopèdia Catalana	0272492
dynodwr KBpedia	Dubnium
dynodwr NKC	ph928215
dynodwr Treccani	dubnio

Dubni (Db)

Nodwedd Ffisegol

Nodwedd Gemegol

other

Isotopes of Dubnium

255Db

256Db

257Db

258Db

259Db

260Db

261Db

262Db

263Db

264Db

265Db

266Db

267Db

268Db

269Db

270Db

hanes

source

Nuclear Screening Constants

²⁵⁵Db

²⁵⁶Db

²⁵⁷Db

²⁵⁸Db

²⁵⁹Db

²⁶⁰Db

²⁶¹Db

²⁶²Db

²⁶³Db

²⁶⁴Db

²⁶⁵Db

²⁶⁶Db

²⁶⁷Db

²⁶⁸Db

²⁶⁹Db

²⁷⁰Db