38
Sr
Strontium
87.621
Basic Information
Bohr Model
Descriptive Numbers
Mass
Periodic Position
Classification
Abundance
Color
Atomic Radius
Temperature
Density
Heat
Electrical Resistance
Magnetic Properties
Elasticity
Hardness
Etymology
Discovery & Isolation
Production & Use
Radioactivity
Electron Affinity
Dipole Polarity
Lattice
Electron & Quantum
List of Compounds
Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
7440-24-6
CID Number
CID5359327
DOT Number
1383
Mendeleev Number
8
Pettifor Number
15
Space Group Number
225
Glawe Number
15
Mass
Atomic Mass
87.621 Da
Uncertainty
0.01
Periodic Position
X Position
2
Y Position
5
Period
5
Group
2
Classification
Block
s
Category
Alkaline Earth Metal
Geochemical
Alkali Toprak Metals
Goldschmidt
Lithophilic
Electrical Type
Conductive
Abundance
Urban Soil
0.458 mg/kg
Seawater
0.0000079 kg/L
Sun
0.000022 mole ratio to silicon
Earth Crust
0.00037 g
Solar System
0.000024 mole ratio to silicon
Meteorites
0.00086 %
Color
Jmol
#00FF00
Molcas Gv
#00FF00
CPK
#FF1493
Atomic Radius
Empirical
200
Calculated
219
Van Der Waals
249
Batsanov
255
Rahm
279
Uff
364.1
Mm3
300
Alvarez
284
Bragg
195
Truhlar
249
Covalent (Single Bound)
192
Covalent (Triple Bound)
139
Covalent (Cordero)
195
Covalent (Pyykko)
185
Covalent (Pyykko Double)
157
Covalent (Pyykko Triple)
139
Mendeleev
191
C12
215
Metallic
215
Temperature
Melting/Freeze (USE)
1050 °K
Melting/Freeze (WEL)
1050 °K
Melting/Freeze (CRC)
1050 °K
Melting/Freeze (LNG)
1030 °K
Boiling/Density (USE)
1650 °K
Boiling/Density (WEL)
1655 °K
Boiling/Density (CRC)
1650 °K
Boiling/Density (LNG)
1639 °K
Boiling/Density (Zhang)
1653 °K
Density
STP
2.64 kg/cm³
Solid (WEL)
2630 kg/cm³
Solid (CRC)
2640 kg/cm³
Solid (LNG)
2640 kg/cm³
Liquid (CR2)
6980 kg/cm³
Heat
Molar Volume
33.94 cm³/mol
Atomic Volume
33.7 cm³
Heat Of Fusion USE
9.2 kJ/mol
Heat Of Fusion CRC
7.43 kJ/mol
Heat Of Fusion LNG
7.43 kJ/mol
Heat Of Fusion WEL
8 kJ/mol
Evaporation USE
144 kJ/mol
Evaporation LNG
136.9 kJ/mol
Evaporation WEL
137 kJ/mol
Evaporation Zhang
141 kJ/mol
Molar Heat
26.4 J/molK
Heat Capacity USE
0.301 J/gK
Heat Capacity CRC
26.4 J/gK
Heat Capacity LNG
26.79 J/gK
Heat Capacity WEL
26 J/gK
Thermal Expansion
0.0000225 1/K
Adiabatic Index
N/A
Electrical Resistance
80k
36.4 nΩm
273k
123 nΩm
293k
132 nΩm
298k
134 nΩm
300k
135 nΩm
500k
222 nΩm
Magnetic Properties
Order
paramanyetic
Susceptibility
1.3e-9 m3/kg
Elasticity
Shear Modulus
6.1 GPa
Poisson Ratio
0.28 ν
Hardness
Mohs
1.5
Etymology
Description
It is a soft, yellowish metal element. It belongs to the second group of the periodic table. It is chemically highly reactive. Sr-90 is found in radioactive fallout and has a half-life of 28 years. It was discovered by Klaproth and Hope in 1798 and isolated by Humprhy Davy in 1808.
Language Of Origin
Scottish via English
Origin Of Word
From a small town called Strontian in Scotland
Meaning
Proper noun (literal meaning: "headland of haunted hill")
Symbol Origin
place name
Etymological Description
It is named after the mineral strontianite (the name of strontianite comes from the town of Strontian in Scotland, where the mineral is found).
Discovery & Isolation
Observed/Predicted By
W. Cruikshank
Observed/Discovery Year
1787
Discovery Location
Isolated Sample By
H. Crowds
Isolated Sample Year
1808
Production & Use
Sources
It is found in the minerals celestine and strontianite.
Uses
It is used in fireworks and flares to give a red color. Strontium-90 is a long-lived, highly radioactive product formed by nuclear fallout after atomic bomb explosions.
Radioactivity
Half Life
Stable
Lifetime
Stable
Neutron Mass Absorption
0.0005
Neutron Cross Section
1.2
Electron Affinity
Electron Affinity (eV)
0.048
Electron Affinity (kJ/mol)
5.023
Electron Affinity (pauling)
0.95
Electron Affinity (allen)
5.695
Electron Affinity (ghosh)
0.1185082
Dipole Polarity
Accepted
197.2
Uncertainty
0.2
C6 GB
3230
C6 Coefficient
3175
Lattice
Constant Internal Default Radius
6.08
Constant
608.49, 608.49, 608.49
Strucutre
FCC
Angles
p/2, p/2, p/2
Electron & Quantum
Oxidation States
1,2
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
Quantum Number
1S0
Electron Configuration Semantic
[Kr] 5s2
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
8
Shells-4
2
Ionization Energies-0
549.5
Ionization Energies-1
1064.2
Ionization Energies-2
4138
Ionization Energies-3
5500
Ionization Energies-4
6910
Ionization Energies-5
8760
Ionization Energies-6
10230
Ionization Energies-7
11800
Ionization Energies-8
15600
Ionization Energies-9
17100
Ionization Energies-10
31270
List of Compounds
1-10 of 50 compounds
| Formula | Names |
|---|---|
| Sr | strontium strontium metal |
| SrB6 | strontium hexaboride |
| SrBr2 | strontium bromide strontium bromide anhydrous strontium dibromide |
| SrCl2 | strontium chloride strontium dichloride |
| SrF2 | strontium fluoride strontium difluoride strontium fluoride metals basis whitepowder strontium fluoride reagent white powder |
| H2Sr | strontium hydride strontium dihydride |
| SrI2 | strontium iodide hydriodic acid strontium salt (2:1) strontium diiodide strontium iodide anhydrous |
| SrO | strontium oxide ketostrontium oxostrontium stronium oxide strontia strontium monoxide |
| SrO2 | strontium peroxide strontium dioxide |
| Sr3P2 | strontium phosphide strontium phosphide (sr3P2) tristrontium diphosphide |
