Fluor (F)

chemical element with symbol F and atomic number 9

Atomic Number	9
Atomic Weight	18.998403163
Rhif màs	19

Group	17
Period	2
Block	p

Proton	9 p⁺
Niwtron	10 n⁰
Electron	9 e^-

Nodwedd Ffisegol

Atomic Radius	50 pm 163 pm
molar volume	17.1 cm³/mol
covalent radius	64 pm 59 pm 53 pm 67 pm 57 pm
Metallic Radius
ionic radius	128.5 pm 130 pm 131 pm 133 pm 8 pm
Crystal Radius	114.5 pm 116 pm 117 pm 119 pm 22 pm
Van der Waals radius	150 pm 147 pm 347.2 pm 147 pm 171 pm 146 pm 336.4 pm
density	0.001553 g/cm³

Nodwedd Gemegol

{ERROR}

egni

proton affinity	340.1 kJ/mol
electron affinity	3.4011897 eV/particle
ionization energy	17.42282 eV/particle 34.97081 eV/particle 62.708 eV/particle 87.175 eV/particle 114.249 eV/particle 157.1631 eV/particle 185.1868 eV/particle 953.898 eV/particle 1,103.11743 eV/particle

enthalpy of vaporization	6.54 kJ/mol
enthalpy of fusion	0.51 kJ/mol
standard enthalpy of formation	79.335 kJ/mol
Electron

plisgyn yr electron	2, 7

valence electron	7 ⓘ

trefn yr electronnau	[He] 2s² 2p⁵ⓘ 1s² 2s² 2p⁵

Cyflwr ocsidiad	-1, 0
Electronegatifedd	24.8 eV/particle 0.344443 3.98
Electrophilicity Index	3.865807423136221 eV/particle
cyflwr sylfaenol mater

cyflwr mater
gaseous state of matter	Diatomic
Boiling Point	85.04 K
Melting Point	53.48 K
critical pressure	5.1724 MPa
critical temperature	144.41 K
triple point	53.48 K 90 kPa
appearance
lliw	Black #daa520 #90e050 #7fd03b
appearance
Mynegrif plygiant	1.000195
nodwedd ffisegol gwrthrych
Thermal Conductivity	0.028 W/(m K)
thermal expansion
molar heat capacity	31.304 J/(mol K)
Specific Heat Capacity	0.824 J/(g⋅K)
heat capacity ratio	7/5
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	{ERROR}
lattice constant
Lattice Angles	π/2, π/2, π/2
nodwedd mecanyddol deunyddiau
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
Category	Actinides, Halogens
CAS Group	VIIB
IUPAC Group	VIIA
Glawe Number	102
Mendeleev Number	106
Pettifor Number	102
Geochemical Class	semi-volatile
Goldschmidt classification	litophile

other

Gas Basicity	315.1 kJ/mol
polarizability	3.74 ± 0.08 a₀
C6 Dispersion Coefficient	9.52 a₀ 10.2 a₀
allotrope	Difluorine
Neutron cross section	0.0096
Neutron Mass Absorption	0.00002
quantum number	2P3/2
space group	15 (C12/c1)

Isotopes of Fluorine

Stable Isotopes	1
Unstable Isotopes	18
Natural Isotopes	1

¹³F

Rhif màs	13
neutron number	4
Relative Atomic Mass	13.045121 ± 0.000537 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)

¹⁴F

Rhif màs	14
neutron number	5
Relative Atomic Mass	14.034315196 ± 0.000044142 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	500 ± 60 ys
spin	2
nuclear quadrupole moment
dyddiad darganfod	2010
parity	-

decay mode	intensity
p (proton emission)

¹⁵F

Rhif màs	15
neutron number	6
Relative Atomic Mass	15.017785139 ± 0.000015029 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	1.1 ± 0.3 zs
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1978
parity	+

decay mode	intensity
p (proton emission)	100%

¹⁶F

Rhif màs	16
neutron number	7
Relative Atomic Mass	16.011460278 ± 0.000005758 Da
g-factor	0
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	21 ± 5 zs
spin	0
nuclear quadrupole moment	0
dyddiad darganfod	1964
parity	-

decay mode	intensity
p (proton emission)	100%

¹⁷F

Rhif màs	17
neutron number	8
Relative Atomic Mass	17.002095237 ± 0.000000266 Da
g-factor	1.88852 ± 0.00012
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	64.37 ± 0.027 s
spin	5/2
nuclear quadrupole moment	0.076 ± 0.004
dyddiad darganfod	1934
parity	+

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

¹⁸F

Rhif màs	18
neutron number	9
Relative Atomic Mass	18.000937324 ± 0.000000497 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	109.734 ± 0.008 m
spin	1
nuclear quadrupole moment
dyddiad darganfod	1937
parity	+

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

¹⁹F

Rhif màs	19
neutron number	10
Relative Atomic Mass	18.99840316207 ± 0.00000000088 Da
g-factor	5.256642 ± 0.000008
natural abundance	100
Dadfeilio ymbelydrol	stable isotope
Hanner oes	Not Radioactive ☢️
spin	1/2
nuclear quadrupole moment	0
dyddiad darganfod	1920
parity	+

²⁰F

Rhif màs	20
neutron number	11
Relative Atomic Mass	19.999981252 ± 0.000000031 Da
g-factor	1.046675 ± 0.000045
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	11.0062 ± 0.008 s
spin	2
nuclear quadrupole moment	0.056 ± 0.004
dyddiad darganfod	1935
parity	+

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

²¹F

Rhif màs	21
neutron number	12
Relative Atomic Mass	20.999948893 ± 0.000001932 Da
g-factor	1.56776 ± 0.00048
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	4.158 ± 0.02 s
spin	5/2
nuclear quadrupole moment	0.011 ± 0.002
dyddiad darganfod	1955
parity	+

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

²²F

Rhif màs	22
neutron number	13
Relative Atomic Mass	22.002998812 ± 0.00001331 Da
g-factor	0.6736 ± 0.0001
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	4.23 ± 0.04 s
spin	4
nuclear quadrupole moment	0.003 ± 0.002
dyddiad darganfod	1965
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	11%

²³F

Rhif màs	23
neutron number	14
Relative Atomic Mass	23.003526875 ± 0.00003577 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2.23 ± 0.14 s
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1970
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	14%

²⁴F

Rhif màs	24
neutron number	15
Relative Atomic Mass	24.00809937 ± 0.000104853 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	384 ± 16 ms
spin	3
nuclear quadrupole moment
dyddiad darganfod	1970
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	5.9%

²⁵F

Rhif màs	25
neutron number	16
Relative Atomic Mass	25.012167727 ± 0.000103535 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	80 ± 9 ms
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1970
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	23.1%
2n (2-neutron emission)

²⁶F

Rhif màs	26
neutron number	17
Relative Atomic Mass	26.020048065 ± 0.000114898 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	8.2 ± 0.9 ms
spin	1
nuclear quadrupole moment
dyddiad darganfod	1979
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	13.5%
2n (2-neutron emission)

²⁷F

Rhif màs	27
neutron number	18
Relative Atomic Mass	27.026981897 ± 0.000129037 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	5 ± 0.2 ms
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1981
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	77%
2n (2-neutron emission)

²⁸F

Rhif màs	28
neutron number	19
Relative Atomic Mass	28.035860448 ± 0.000129198 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	46 zs
spin	4
nuclear quadrupole moment
dyddiad darganfod	2012
parity	-

decay mode	intensity
n (neutron emission)	100%

²⁹F

Rhif màs	29
neutron number	20
Relative Atomic Mass	29.043103 ± 0.000564 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes	2.5 ± 0.3 ms
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1989
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	60%
2n (2-neutron emission)

³⁰F

Rhif màs	30
neutron number	21
Relative Atomic Mass	30.052561 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod
parity

decay mode	intensity
n (neutron emission)

³¹F

Rhif màs	31
neutron number	22
Relative Atomic Mass	31.061023 ± 0.000574 Da
g-factor
natural abundance
Dadfeilio ymbelydrol	☢️ elfen ymbelydrol
Hanner oes
spin	5/2
nuclear quadrupole moment
dyddiad darganfod	1999
parity	+

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

hanes

darganfyddwr neu ddyfeisiwr	Henri Moissan
man darganfod	France
dyddiad darganfod	1886
geirdarddiad	Latin: fluere (flow).
ynganiad	FLU-eh-reen (Saesneg)

source

Abundance
Abundance in Earth's crust	585 mg/kg
natural abundance (cefnfor)	1.3 mg/L
natural abundance (corff dynol)	0.0037 %
natural abundance (Awyrfaen)	0.0087 %
natural abundance (Haul)	0.00005 %
Abundance in Universe	0.00004 %

Nuclear Screening Constants

1	s	0.3499
2	p	3.9
2	s	3.8724

Fluor on ChemicalAid

Fluor (F)

Nodwedd Ffisegol

Nodwedd Gemegol

other

Isotopes of Fluorine

13F

14F

15F

16F

17F

18F

19F

20F

21F

22F

23F

24F

25F

26F

27F

28F

29F

30F

31F

hanes

source

Nuclear Screening Constants

¹³F

¹⁴F

¹⁵F

¹⁶F

¹⁷F

¹⁸F

¹⁹F

²⁰F

²¹F

²²F

²³F

²⁴F

²⁵F

²⁶F

²⁷F

²⁸F

²⁹F

³⁰F

³¹F