Periodic Table Element Comparison: Compare Elements - Helium vs Fluorine

Compare Helium and Fluorine

Compare Helium and Fluorine on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Helium vs Fluorine with most reliable information about their properties, attributes, facts, uses etc. You can compare He vs F on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Name	Helium	Fluorine
Atomic Number	2	9
Atomic Symbol	He	F
Atomic Weight	4.002602	18.9984032
Phase at STP	Gas	Gas
Color	Colorless	Colorless
Metallic Classification	Noble Gas	Halogens
Group in Periodic Table	group 18	group 17
Group Name	helium family or neon family	fluorine family
Period in Periodic Table	period 1	period 2
Block in Periodic Table	p -block	p -block
Electronic Configuration	1s2	[He] 2s2 2p5
Electronic Shell Structure (Electrons per shell)	2	2, 7
Melting Point	0 K	53.5 K
Boiling Point	4.22 K	85.03 K
CAS Number	CAS7440-59-7	CAS7782-41-4
Neighborhood Elements	Neighborhood Elements of Helium	Neighborhood Elements of Fluorine

History	The element Helium was discovered by P. Janssen and N. Lockyer in year 1868 in Sweden and United Kingdom. Helium derived its name from the Greek word helios, meaning 'sun'.	The element Fluorine was discovered by A.-M. Ampère in year 1810 in France. Fluorine derived its name from the Latin fluere, meaning 'to flow'.
Discovery	P. Janssen and N. Lockyer (1868)	A.-M. Ampère (1810)
Isolated	W. Ramsay,T. Cleve, and N. Langlet (1895)	H. Moissan (1886)

Abundance in Universe	230000000 / 72000000	400 / 30
Abundance in Sun	230000000 / 74000000	500 / 30
Abundance in Meteorites	- / -	89000 / 96000
Abundance in Earth's Crust	5.5 / 30	540000 / 590000
Abundance in Oceans	0.0072 / 0.011	1300 / 420
Abundance in Humans	- / -	37000 / 12000

Atomic Volume	22.4136 cm3/mol	11.202 cm3/mol
Atomic Radius	31 pm	42 pm
Covalent Radius	32 pm	71 pm
Van der Waals Radius	140 pm	147 pm
Atomic Spectrum
Lattice Constant	424.2, 424.2, 424.2 pm	550, 328, 728 pm
Lattice Angle	π/2, π/2, π/2	π/2, π/2, π/2
Space Group Name	Fm_ 3m	C12/c1
Space Group Number	225	15
Crystal Structure	Face Centered Cubic	Base Centered Monoclinic

Atomic Number	2	9
Number of Electrons (with no charge)	2	9
Number of Protons	2	9
Mass Number	4.002602	18.9984032
Number of Neutrons	2	10
Shell structure (Electrons per energy level)	2	2, 7
Electron Configuration	1s2	[He] 2s2 2p5
Valence Electrons	1s2	2s2 2p5
Oxidation State	-	-1
Atomic Term Symbol (Quantum Numbers)	1S0	2P3/2
Shell structure

Known Isotopes	3He, 4He, 5He, 6He, 7He, 8He, 9He, 10He	14F, 15F, 16F, 17F, 18F, 19F, 20F, 21F, 22F, 23F, 24F, 25F, 26F, 27F, 28F, 29F, 30F, 31F
Stable Isotopes	Naturally occurring stable isotopes: 3He, 4He	Naturally occurring stable isotopes: 19F
Neutron Cross Section	0.007	0.0096
Neutron Mass Absorption	0.00001	0.00002

Valence or Valency	0	1
Electronegativity	-	3.98 Pauling Scale
Electron Affinity	0 kJ/mol	328 kJ/mol
Ionization Energies	1st: 2372.3 kJ/mol 2nd: 5250.5 kJ/mol	1st: 1681 kJ/mol 2nd: 3374.2 kJ/mol 3rd: 6050.4 kJ/mol 4th: 8407.7 kJ/mol 5th: 11022.7 kJ/mol 6th: 15164.1 kJ/mol 7th: 17868 kJ/mol 8th: 92038.1 kJ/mol 9th: 106434.3 kJ/mol

Density	0.0001785 g/cm3	0.001696 g/cm3
Molar Volume	22.4136 cm3/mol	11.202 cm3/mol
Elastic Properties
Young Modulus	-	-
Shear Modulus	-	-
Bulk Modulus	-	-
Poisson Ratio	-	-
Hardness - Tests to Measure of Hardness of Element
Mohs Hardness	-	-
Vickers Hardness	-	-
Brinell Hardness	-	-
Electrical Properties
Electrical Conductivity	-	-
Resistivity	-	-
Superconducting Point	-	-
Heat and Conduction Properties
Thermal Conductivity	0.1513 W/(m K)	0.0277 W/(m K)
Thermal Expansion	-	-
Magnetic Properties
Magnetic Type	Diamagnetic	-
Curie Point	-	-
Mass Magnetic Susceptibility	-5.9e-9 m3/kg	-
Molar Magnetic Susceptibility	-2.36e-11 m3/mol	-
Volume Magnetic Susceptibility	-1.05e-9	-
Optical Properties
Refractive Index	1.000035	1.000195
Acoustic Properties
Speed of Sound	970 m/s	-

CAS Number	CAS7440-59-7	CAS7782-41-4
RTECS Number	RTECSMH6520000	RTECSLM6475000
DOT Hazard Class	2.2	2.3
DOT Numbers	1963	9192
EU Number	-	EU231-954-8
NFPA Fire Rating	0	0
NFPA Hazards	-	Oxidizing Agent, Water Reactive
NFPA Health Rating	1	4
NFPA Reactivity Rating	0	4
AutoIgnition Point	-	-
Flashpoint	-	-

Periodic Table Element Comparison: Compare Elements - Helium vs Fluorine

Compare Helium and Fluorine

Facts

History

Presence: Abundance in Nature and Around Us

Crystal Structure and Atomic Structure

Atomic and Orbital Properties

Isotopes and Nuclear Properties

Chemical Properties: Ionization Energies and electron affinity

Physical Properties

Elastic Properties

Hardness - Tests to Measure of Hardness of Element

Electrical Properties

Heat and Conduction Properties

Magnetic Properties

Optical Properties

Acoustic Properties

Thermal Properties - Enthalpies and thermodynamics

Enthalpies

Regulatory and Health - Health and Safety Parameters and Guidelines

Compare With Other Elements

Compare Helium with all Group 18 elements

Compare Helium with all Period 1 elements

Compare Helium with all Noble Gas elements

Compare Fluorine with all Group 17 elements

Compare Fluorine with all Period 2 elements

Compare Fluorine with all Halogens elements