Lantani (La)

chemical element with symbol La and atomic number 57

Atomic Number	57
Atomic Weight	138.90547
Rhif màs	139

Group	3
Period	6
Block	d

Proton	57 p⁺
Niwtron	82 n⁰
Electron	57 e^-

Nodwedd Ffisegol

Atomic Radius	195 pm 284 pm
molar volume	22.5 cm³/mol
covalent radius	180 pm 139 pm 139 pm 207 pm
Metallic Radius	169 pm 187 pm
ionic radius	103.2 pm 110 pm 116 pm 121.6 pm 127 pm 136 pm
Crystal Radius	117.2 pm 124 pm 130 pm 135.6 pm 141 pm 150 pm
Van der Waals radius	250 pm 243 pm 278 pm 352.2 pm
density	6.15 g/cm³ 5,940 kg/m³

Nodwedd Gemegol

{ERROR}

egni

proton affinity	1,013 kJ/mol
electron affinity	0.47 eV/particle
ionization energy	5.5769 eV/particle 11.18492 eV/particle 19.1773 eV/particle 49.95 eV/particle 61.6 eV/particle 74 eV/particle 88 eV/particle 105 eV/particle 119 eV/particle 151.42 eV/particle 168.77 eV/particle 275 eV/particle 303 eV/particle 332 eV/particle 364 eV/particle 393 eV/particle 431 eV/particle 464 eV/particle 498 eV/particle 533 eV/particle 566 eV/particle 696 eV/particle 731 eV/particle 770 eV/particle 806 eV/particle 865 eV/particle 906 eV/particle 995 eV/particle 1,039.09 eV/particle 1,800 eV/particle 1,884 eV/particle 1,974 eV/particle 2,069 eV/particle 2,162 eV/particle 2,259 eV/particle 2,377 eV/particle 2,473 eV/particle 2,577 eV/particle 2,674 eV/particle 2,950 eV/particle 3,036 eV/particle 3,133 eV/particle 3,222 eV/particle 3,416 eV/particle 3,515 eV/particle 3,704 eV/particle 3,800 eV/particle 8,669 eV/particle 8,914 eV/particle 9,184 eV/particle 9,437 eV/particle 10,136 eV/particle 10,426 eV/particle 10,789 eV/particle 11,033.4 eV/particle 45,144.994 eV/particle 46,245.6 eV/particle

enthalpy of vaporization	402 kJ/mol
enthalpy of fusion	8.5 kJ/mol
standard enthalpy of formation	431 kJ/mol
Electron

plisgyn yr electron	2, 8, 18, 18, 9, 2

valence electron	2 ⓘ

trefn yr electronnau	[Xe] 5d¹ 6s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 5d¹ 6s²

Cyflwr ocsidiad	0, 1, 2, 3
Electronegatifedd	0.163142 1.1
Electrophilicity Index	0.894990101871977 eV/particle
cyflwr sylfaenol mater

cyflwr mater
gaseous state of matter
Boiling Point	3,737.15 K
Melting Point	1,193.15 K
critical pressure
critical temperature
triple point
appearance
lliw	Black #ff1493 #70d4ff #70d4ff
appearance	silvery white
Mynegrif plygiant
nodwedd ffisegol gwrthrych
Thermal Conductivity	13.4 W/(m K)
thermal expansion	0.0000121 1/K
molar heat capacity	27.11 J/(mol K)
Specific Heat Capacity	0.195 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
dargludedd trydanol	1.6 MS/m
Gwrthedd	0.00000061 Ω*m
superconductivity	4.88 K
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.000000011 m³/Kg
magnetic susceptibility (Molar)	0.000000001528 m³/mol
magnetic susceptibility (Volume)	0.00006761
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal Structure	{ERROR}
lattice constant	3.75 Å
Lattice Angles	π/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness	363 MPa 2.5 MPa 491 MPa
bulk modulus	28 GPa
shear modulus	14 GPa
Young's modulus	37 GPa
Poisson's ratio	0.28
speed of sound	2,475 m/s
classification
Category	Actinides, Lanthanides
CAS Group	IIIA
IUPAC Group	IIIB
Glawe Number	32
Mendeleev Number	13
Pettifor Number	33
Geochemical Class	rare earth & related
Goldschmidt classification	litophile

other

Gas Basicity	991.9 kJ/mol
polarizability	215 ± 20 a₀
C6 Dispersion Coefficient	3,730 a₀
allotrope
Neutron cross section	8.98
Neutron Mass Absorption	0.0023
quantum number	2D3/2
space group	194 (P63/mmc)

Isotopes of Lanthanum

Stable Isotopes	1
Unstable Isotopes	41
Natural Isotopes	2

¹¹⁶La

Rhif màs	116
neutron number	59
Relative Atomic Mass	115.957005 ± 0.000345 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)
p (proton emission)

¹¹⁷La

Rhif màs	117
neutron number	60
Relative Atomic Mass	116.950326 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	21.7 ± 1.8 ms
spin	3/2
nuclear quadrupole moment
dyddiad darganfod	2001
parity	+

decay mode	intensity
p (proton emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)

¹¹⁸La

Rhif màs	118
neutron number	61
Relative Atomic Mass	117.946731 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	1
nuclear quadrupole moment
dyddiad darganfod
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)

¹¹⁹La

Rhif màs	119
neutron number	62
Relative Atomic Mass	118.940934 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	11/2
nuclear quadrupole moment
dyddiad darganfod
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹²⁰La

Rhif màs	120
neutron number	63
Relative Atomic Mass	119.938196 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2.8 ± 0.2 s
spin	1
nuclear quadrupole moment
dyddiad darganfod	1984
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

¹²¹La

Rhif màs	121
neutron number	64
Relative Atomic Mass	120.933236 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	5.3 ± 0.2 s
spin	11/2
nuclear quadrupole moment
dyddiad darganfod	1988
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

¹²²La

Rhif màs	122
neutron number	65
Relative Atomic Mass	121.93071 ± 0.00032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	8.6 ± 0.5 s
spin	1
nuclear quadrupole moment
dyddiad darganfod	1984
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

¹²³La

Rhif màs	123
neutron number	66
Relative Atomic Mass	122.9263 ± 0.00021 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	17 ± 3 s
spin	11/2
nuclear quadrupole moment
dyddiad darganfod	1978
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹²⁴La

Rhif màs	124
neutron number	67
Relative Atomic Mass	123.924574275 ± 0.000060836 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	29.21 ± 0.17 s
spin	7
nuclear quadrupole moment
dyddiad darganfod	1978
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹²⁵La

Rhif màs	125
neutron number	68
Relative Atomic Mass	124.920815931 ± 0.000027909 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	64.8 ± 1.2 s
spin	11/2
nuclear quadrupole moment
dyddiad darganfod	1973
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹²⁶La

Rhif màs	126
neutron number	69
Relative Atomic Mass	125.919512667 ± 0.000097163 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	54 ± 2 s
spin	5
nuclear quadrupole moment
dyddiad darganfod	1961
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹²⁷La

Rhif màs	127
neutron number	70
Relative Atomic Mass	126.916375083 ± 0.000027912 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	5.1 ± 0.1 m
spin	11/2
nuclear quadrupole moment
dyddiad darganfod	1963
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹²⁸La

Rhif màs	128
neutron number	71
Relative Atomic Mass	127.915592123 ± 0.000058452 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	5.18 ± 0.14 m
spin	5
nuclear quadrupole moment
dyddiad darganfod	1961
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹²⁹La

Rhif màs	129
neutron number	72
Relative Atomic Mass	128.912695592 ± 0.000022913 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	11.6 ± 0.2 m
spin	3/2
nuclear quadrupole moment
dyddiad darganfod	1963
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁰La

Rhif màs	130
neutron number	73
Relative Atomic Mass	129.912369413 ± 0.000027854 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	8.7 ± 0.1 m
spin	3
nuclear quadrupole moment
dyddiad darganfod	1961
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³¹La

Rhif màs	131
neutron number	74
Relative Atomic Mass	130.91007 ± 0.00003 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	59 ± 2 m
spin	3/2
nuclear quadrupole moment
dyddiad darganfod	1951
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³²La

Rhif màs	132
neutron number	75
Relative Atomic Mass	131.910119047 ± 0.000039032 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	4.59 ± 0.04 h
spin	2
nuclear quadrupole moment
dyddiad darganfod	1951
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³³La

Rhif màs	133
neutron number	76
Relative Atomic Mass	132.908218 ± 0.00003 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	3.912 ± 0.008 h
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1950
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁴La

Rhif màs	134
neutron number	77
Relative Atomic Mass	133.908514011 ± 0.000021395 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	6.45 ± 0.16 m
spin	1
nuclear quadrupole moment
dyddiad darganfod	1951
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁵La

Rhif màs	135
neutron number	78
Relative Atomic Mass	134.906984427 ± 0.000010126 Da
g-factor	1.48 ± 0.036
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	18.91 ± 0.02 h
spin	5/2
nuclear quadrupole moment	-0.4 ± 0.4
dyddiad darganfod	1948
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁶La

Rhif màs	136
neutron number	79
Relative Atomic Mass	135.907634962 ± 0.000057081 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	9.87 ± 0.03 m
spin	1
nuclear quadrupole moment
dyddiad darganfod	1950
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹³⁷La

Rhif màs	137
neutron number	80
Relative Atomic Mass	136.906450438 ± 0.00000176 Da
g-factor	0.77028571428571 ± 0.0017142857142857
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	60 ± 20 ky
spin	7/2
nuclear quadrupole moment	0.21 ± 0.04
dyddiad darganfod	1948
parity	+

decay mode	intensity
ϵ (electron capture)	100%

¹³⁸La

Rhif màs	138
neutron number	81
Relative Atomic Mass	137.907124041 ± 0.000000446 Da
g-factor	0.74168 ± 0.00004
natural abundance	0.08881 ± 0.00071
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	103 ± 1 Gy
spin	5
nuclear quadrupole moment	0.39 ± 0.03
dyddiad darganfod	1947
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	65.5%
β⁻ (β⁻ decay)	34.5%

¹³⁹La

Rhif màs	139
neutron number	82
Relative Atomic Mass	138.906362927 ± 0.000000651 Da
g-factor	0.79402857142857 ± 0.000057142857142857
natural abundance	99.91119 ± 0.00071
Dadfeilio ymbelydrol	stable isotope
Hanner oes	Not Radioactive ☢️
spin	7/2
nuclear quadrupole moment	0.206 ± 0.004
dyddiad darganfod	1924
parity	+

¹⁴⁰La

Rhif màs	140
neutron number	83
Relative Atomic Mass	139.909487285 ± 0.000000651 Da
g-factor	0.24333333333333 ± 0.005
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	40.289 ± 0.004 h
spin	3
nuclear quadrupole moment	0.087 ± 0.013
dyddiad darganfod	1935
parity	-

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

¹⁴¹La

Rhif màs	141
neutron number	84
Relative Atomic Mass	140.910971155 ± 0.00000443 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	3.92 ± 0.03 h
spin	7/2
nuclear quadrupole moment
dyddiad darganfod	1951
parity	+

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

¹⁴²La

Rhif màs	142
neutron number	85
Relative Atomic Mass	141.91409076 ± 0.000006748 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	91.1 ± 0.5 m
spin	2
nuclear quadrupole moment
dyddiad darganfod	1953
parity	-

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

¹⁴³La

Rhif màs	143
neutron number	86
Relative Atomic Mass	142.916079482 ± 0.000007868 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	14.2 ± 0.1 m
spin	7/2
nuclear quadrupole moment
dyddiad darganfod	1951
parity

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

¹⁴⁴La

Rhif màs	144
neutron number	87
Relative Atomic Mass	143.919645589 ± 0.000013888 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	44 ± 0.7 s
spin	3
nuclear quadrupole moment
dyddiad darganfod	1967
parity	-

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

¹⁴⁵La

Rhif màs	145
neutron number	88
Relative Atomic Mass	144.921808065 ± 0.00001317 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	24.8 ± 2 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1974
parity	+

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

¹⁴⁶La

Rhif màs	146
neutron number	89
Relative Atomic Mass	145.925688017 ± 0.000001797 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	9.9 ± 0.1 s
spin	5
nuclear quadrupole moment
dyddiad darganfod	1970
parity	-

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

¹⁴⁷La

Rhif màs	147
neutron number	90
Relative Atomic Mass	146.9284178 ± 0.0000115 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	4.026 ± 0.02 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1979
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.041%

¹⁴⁸La

Rhif màs	148
neutron number	91
Relative Atomic Mass	147.9326794 ± 0.0000209 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.414 ± 0.025 s
spin	2
nuclear quadrupole moment
dyddiad darganfod	1969
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.18%

¹⁴⁹La

Rhif màs	149
neutron number	92
Relative Atomic Mass	148.935351259 ± 0.00021499 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.071 ± 0.022 s
spin	3/2
nuclear quadrupole moment
dyddiad darganfod	1979
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.43%

¹⁵⁰La

Rhif màs	150
neutron number	93
Relative Atomic Mass	149.9395475 ± 0.0000027 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	504 ± 15 ms
spin	3
nuclear quadrupole moment
dyddiad darganfod	1993
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2.7%

¹⁵¹La

Rhif màs	151
neutron number	94
Relative Atomic Mass	150.942769 ± 0.0004675 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	465 ± 24 ms
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1994
parity	+

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

¹⁵²La

Rhif màs	152
neutron number	95
Relative Atomic Mass	151.947085 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	287 ± 16 ms
spin	2
nuclear quadrupole moment
dyddiad darganfod	1994
parity	-

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

¹⁵³La

Rhif màs	153
neutron number	96
Relative Atomic Mass	152.950553 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	245 ± 18 ms
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1994
parity	+

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

¹⁵⁴La

Rhif màs	154
neutron number	97
Relative Atomic Mass	153.955416 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	161 ± 15 ms
spin	2
nuclear quadrupole moment
dyddiad darganfod	2017
parity	-

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

¹⁵⁵La

Rhif màs	155
neutron number	98
Relative Atomic Mass	154.95928 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	101 ± 28 ms
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	2016
parity	+

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

¹⁵⁶La

Rhif màs	156
neutron number	99
Relative Atomic Mass	155.964519 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	84 ± 78 ms
spin	4
nuclear quadrupole moment
dyddiad darganfod	2017
parity	+

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

¹⁵⁷La

Rhif màs	157
neutron number	100
Relative Atomic Mass	156.968792 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	2018
parity	+

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

hanes

darganfyddwr neu ddyfeisiwr	Carl Mosander
man darganfod	Sweden
dyddiad darganfod	1839
geirdarddiad	Greek: lanthanein (to be hidden).
ynganiad	LAN-the-nem (Saesneg)

source

Abundance
Abundance in Earth's crust	39 mg/kg
natural abundance (cefnfor)	0.0000034 mg/L
natural abundance (corff dynol)
natural abundance (Awyrfaen)	0.000028 %
natural abundance (Haul)	0.0000002 %
Abundance in Universe	0.0000002 %

Nuclear Screening Constants

1	s	1.1317
2	p	4.2044
2	s	15.0466
3	d	13.9398
3	p	18.8604
3	s	19.0569
4	d	32.2748
4	f	55.64
4	p	29.2936
4	s	28.2036
5	p	41.104
5	s	39.189
6	s	47.688

Lantani on ChemicalAid

Lantani (La)

Nodwedd Ffisegol

Nodwedd Gemegol

other

Isotopes of Lanthanum

116La

117La

118La

119La

120La

121La

122La

123La

124La

125La

126La

127La

128La

129La

130La

131La

132La

133La

134La

135La

136La

137La

138La

139La

140La

141La

142La

143La

144La

145La

146La

147La

148La

149La

150La

151La

152La

153La

154La

155La

156La

157La

hanes

source

Nuclear Screening Constants

¹¹⁶La

¹¹⁷La

¹¹⁸La

¹¹⁹La

¹²⁰La

¹²¹La

¹²²La

¹²³La

¹²⁴La

¹²⁵La

¹²⁶La

¹²⁷La

¹²⁸La

¹²⁹La

¹³⁰La

¹³¹La

¹³²La

¹³³La

¹³⁴La

¹³⁵La

¹³⁶La

¹³⁷La

¹³⁸La

¹³⁹La

¹⁴⁰La

¹⁴¹La

¹⁴²La

¹⁴³La

¹⁴⁴La

¹⁴⁵La

¹⁴⁶La

¹⁴⁷La

¹⁴⁸La

¹⁴⁹La

¹⁵⁰La

¹⁵¹La

¹⁵²La

¹⁵³La

¹⁵⁴La

¹⁵⁵La

¹⁵⁶La

¹⁵⁷La