Periodic Table Element Comparison: Compare Elements - Helium vs Strontium

Compare Helium and Strontium

Compare Helium and Strontium 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 Strontium with most reliable information about their properties, attributes, facts, uses etc. You can compare He vs Sr on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Name	Helium	Strontium
Atomic Number	2	38
Atomic Symbol	He	Sr
Atomic Weight	4.002602	87.62
Phase at STP	Gas	Solid
Color	Colorless	Silver
Metallic Classification	Noble Gas	Alkaline Earth Metal
Group in Periodic Table	group 18	group 2
Group Name	helium family or neon family	beryllium family
Period in Periodic Table	period 1	period 5
Block in Periodic Table	p -block	s -block
Electronic Configuration	1s2	[Kr] 5s2
Electronic Shell Structure (Electrons per shell)	2	2, 8, 18, 8, 2
Melting Point	0 K	1050 K
Boiling Point	4.22 K	1655 K
CAS Number	CAS7440-59-7	CAS7440-24-6
Neighborhood Elements	Neighborhood Elements of Helium	Neighborhood Elements of Strontium

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 Strontium was discovered by W. Cruikshank in year 1787 in United Kingdom. Strontium derived its name from Strontian, a small town in Scotland.
Discovery	P. Janssen and N. Lockyer (1868)	W. Cruikshank (1787)
Isolated	W. Ramsay,T. Cleve, and N. Langlet (1895)	H. Davy (1808)

Abundance in Universe	230000000 / 72000000	40 / 0.6
Abundance in Sun	230000000 / 74000000	50 / 0.7
Abundance in Meteorites	- / -	8900 / 2000
Abundance in Earth's Crust	5.5 / 30	360000 / 85000
Abundance in Oceans	0.0072 / 0.011	8100 / 570
Abundance in Humans	- / -	4600 / 330

Atomic Volume	22.4136 cm3/mol	33.94 cm3/mol
Atomic Radius	31 pm	219 pm
Covalent Radius	32 pm	192 pm
Van der Waals Radius	140 pm	249 pm
Atomic Spectrum
Lattice Constant	424.2, 424.2, 424.2 pm	608.49, 608.49, 608.49 pm
Lattice Angle	π/2, π/2, π/2	π/2, π/2, π/2
Space Group Name	Fm_ 3m	Fm_ 3m
Space Group Number	225	225
Crystal Structure	Face Centered Cubic	Face Centered Cubic

Atomic Number	2	38
Number of Electrons (with no charge)	2	38
Number of Protons	2	38
Mass Number	4.002602	87.62
Number of Neutrons	2	50
Shell structure (Electrons per energy level)	2	2, 8, 18, 8, 2
Electron Configuration	1s2	[Kr] 5s2
Valence Electrons	1s2	5s2
Oxidation State	-	2
Atomic Term Symbol (Quantum Numbers)	1S0	1S0
Shell structure

Known Isotopes	3He, 4He, 5He, 6He, 7He, 8He, 9He, 10He	73Sr, 74Sr, 75Sr, 76Sr, 77Sr, 78Sr, 79Sr, 80Sr, 81Sr, 82Sr, 83Sr, 84Sr, 85Sr, 86Sr, 87Sr, 88Sr, 89Sr, 90Sr, 91Sr, 92Sr, 93Sr, 94Sr, 95Sr, 96Sr, 97Sr, 98Sr, 99Sr, 100Sr, 101Sr, 102Sr, 103Sr, 104Sr, 105Sr
Stable Isotopes	Naturally occurring stable isotopes: 3He, 4He	Naturally occurring stable isotopes: 84Sr, 86Sr, 87Sr, 88Sr
Neutron Cross Section	0.007	1.2
Neutron Mass Absorption	0.00001	0.0005

Valence or Valency	0	2
Electronegativity	-	0.95 Pauling Scale
Electron Affinity	0 kJ/mol	5.03 kJ/mol
Ionization Energies	1st: 2372.3 kJ/mol 2nd: 5250.5 kJ/mol	1st: 549.5 kJ/mol 2nd: 1064.2 kJ/mol 3rd: 4138 kJ/mol 4th: 5500 kJ/mol 5th: 6910 kJ/mol 6th: 8760 kJ/mol 7th: 10230 kJ/mol 8th: 11800 kJ/mol 9th: 15600 kJ/mol 10th: 17100 kJ/mol 11th: 31270 kJ/mol

Density	0.0001785 g/cm3	2.63 g/cm3
Molar Volume	22.4136 cm3/mol	33.94 cm3/mol
Elastic Properties
Young Modulus	-	-
Shear Modulus	-	6.1 GPa
Bulk Modulus	-	-
Poisson Ratio	-	0.28
Hardness - Tests to Measure of Hardness of Element
Mohs Hardness	-	1.5 MPa
Vickers Hardness	-	-
Brinell Hardness	-	-
Electrical Properties
Electrical Conductivity	-	7700000 S/m
Resistivity	-	1.3e-7 m Ω
Superconducting Point	-	-
Heat and Conduction Properties
Thermal Conductivity	0.1513 W/(m K)	35 W/(m K)
Thermal Expansion	-	0.0000225 /K
Magnetic Properties
Magnetic Type	Diamagnetic	Paramagnetic
Curie Point	-	-
Mass Magnetic Susceptibility	-5.9e-9 m3/kg	1.32e-9 m3/kg
Molar Magnetic Susceptibility	-2.36e-11 m3/mol	1.16e-10 m3/mol
Volume Magnetic Susceptibility	-1.05e-9	0.00000347
Optical Properties
Refractive Index	1.000035	-
Acoustic Properties
Speed of Sound	970 m/s	-

CAS Number	CAS7440-59-7	CAS7440-24-6
RTECS Number	RTECSMH6520000	-
DOT Hazard Class	2.2	4.2
DOT Numbers	1963	1383
EU Number	-	-
NFPA Fire Rating	0	-
NFPA Hazards	-	-
NFPA Health Rating	1	-
NFPA Reactivity Rating	0	-
AutoIgnition Point	-	-
Flashpoint	-	-

Periodic Table Element Comparison: Compare Elements - Helium vs Strontium

Compare Helium and Strontium

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 Strontium with all Group 2 elements

Compare Strontium with all Period 5 elements

Compare Strontium with all Alkaline Earth Metal elements