Dubnium (Db)

chemical element with the atomic number of 105

Atomic Number	105
Atomic Weight	268
Massagetal	255

Group	5
Period	7
Block	d

proton	105 p⁺
neutron	150 n⁰
elektron	105 e^-

Physical Property

Atoomradius
molar volume
Covalent Radius	149 pm 136 pm 126 pm
Metallic Radius
Ioonradius
Crystal Radius
Van der Waals radius
density	29,3 g/cm³

Chemical Property

{ERROR}

energie

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

Verdampingswarmte
smeltingswarmte
Vormingsentalpie
elektron

Elektronskil	2, 8, 18, 32, 32, 11, 2

Valenselektrone	2 ⓘ

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

Oksidasietoestand	5
Elektronegatiwiteit
Electrophilicity Index
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
triple point
appearance
kleur	Black #d1004f
appearance
Brekingsindeks
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Geleidingsvermoë
Elektriese resistiwiteit
superconductivity
Magnetisme
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	{ERROR}
lattice constant
Lattice Angles
mechanical property
hardness
Massamodulus
Skuifmodulus
Young se modulus
Poisson se verhouding
Spoed van klank
classification
Category	Actinides, 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
Ruimtegroep	()

Isotopes of Dubnium

Stable Isotopes	0
Unstable Isotopes	16
Natural Isotopes	0

²⁵⁵Db

Massagetal	255
neutron number	150
Relative Atomic Mass	255,106919 ± 0,000304 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	54 ms
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	1976
parity	+

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

²⁵⁶Db

Massagetal	256
neutron number	151
Relative Atomic Mass	256,107674 ± 0,000201 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,7 ± 0,4 s
spin	9
nuclear quadrupole moment
ontdekkingsdatum	2001
parity	-

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

²⁵⁷Db

Massagetal	257
neutron number	152
Relative Atomic Mass	257,107520042 ± 0,000176741 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	2,3 ± 0,2 s
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	1985
parity	+

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

²⁵⁸Db

Massagetal	258
neutron number	153
Relative Atomic Mass	258,108972995 ± 0,000098613 Da
g-factor	0
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	2,17 ± 0,36 s
spin	0
nuclear quadrupole moment	0
ontdekkingsdatum	1985
parity	-

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

²⁵⁹Db

Massagetal	259
neutron number	154
Relative Atomic Mass	259,109491859 ± 0,000060854 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	510 ± 160 ms
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	2001
parity	+

decay mode	intensity
α (α emission)	100%

²⁶⁰Db

Massagetal	260
neutron number	155
Relative Atomic Mass	260,111297 ± 0,0001 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,52 ± 0,13 s
spin
nuclear quadrupole moment
ontdekkingsdatum	1970
parity

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

²⁶¹Db

Massagetal	261
neutron number	156
Relative Atomic Mass	261,111979 ± 0,000118 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	4,7 ± 1 s
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	1970
parity	+

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

²⁶²Db

Massagetal	262
neutron number	157
Relative Atomic Mass	262,114067 ± 0,000154 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	34 ± 4 s
spin
nuclear quadrupole moment
ontdekkingsdatum	1971
parity

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

²⁶³Db

Massagetal	263
neutron number	158
Relative Atomic Mass	263,114987 ± 0,00018 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	29 ± 9 s
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	1992
parity	+

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

²⁶⁴Db

Massagetal	264
neutron number	159
Relative Atomic Mass	264,117297 ± 0,000253 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin
nuclear quadrupole moment
ontdekkingsdatum
parity

decay mode	intensity
α (α emission)

²⁶⁵Db

Massagetal	265
neutron number	160
Relative Atomic Mass	265,1185 ± 0,00024 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum
parity	+

decay mode	intensity
α (α emission)

²⁶⁶Db

Massagetal	266
neutron number	161
Relative Atomic Mass	266,121032 ± 0,000304 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	80 ± 70 m
spin
nuclear quadrupole moment
ontdekkingsdatum	2007
parity

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

²⁶⁷Db

Massagetal	267
neutron number	162
Relative Atomic Mass	267,122399 ± 0,000402 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	2 ± 1,1 h
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum	2004
parity	+

decay mode	intensity
SF (spontaneous fission)	100%

²⁶⁸Db

Massagetal	268
neutron number	163
Relative Atomic Mass	268,125669 ± 0,000568 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	29 ± 3 h
spin
nuclear quadrupole moment
ontdekkingsdatum	2004
parity

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

²⁶⁹Db

Massagetal	269
neutron number	164
Relative Atomic Mass	269,127911 ± 0,000669 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd
spin	9/2
nuclear quadrupole moment
ontdekkingsdatum
parity	+

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

²⁷⁰Db

Massagetal	270
neutron number	165
Relative Atomic Mass	270,131399 ± 0,000617 Da
g-factor
natural abundance
radioaktiwiteit	☢️ radioactive element
Halfleeftyd	1,7 ± 1 h
spin
nuclear quadrupole moment
ontdekkingsdatum	2010
parity

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

geskiedenis

Ontdek deur	A. Ghiorso, et al
ligging van ontdekking	United States
ontdekkingsdatum	1970
etimologie	Named after the city of Dubna, the site of the JINR.
uitspraak	HA-ni-em (Engels)

source

Abundance
Abundance in Earth's crust
natural abundance (oseaan)
natural abundance (human body)	0 %
natural abundance (Meteoroïde)	0 %
natural abundance (Son)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Dubnium on ChemicalAid

Dubnium (Db)

Physical Property

Chemical Property

other

Isotopes of Dubnium

255Db

256Db

257Db

258Db

259Db

260Db

261Db

262Db

263Db

264Db

265Db

266Db

267Db

268Db

269Db

270Db

geskiedenis

source

Nuclear Screening Constants

²⁵⁵Db

²⁵⁶Db

²⁵⁷Db

²⁵⁸Db

²⁵⁹Db

²⁶⁰Db

²⁶¹Db

²⁶²Db

²⁶³Db

²⁶⁴Db

²⁶⁵Db

²⁶⁶Db

²⁶⁷Db

²⁶⁸Db

²⁶⁹Db

²⁷⁰Db