Strontium

Overview

English Name:

Strontium

Latin Name:

Strontium

Year Discovered:

1790

Discovered By:

Adair Crawford

Group:

2

Period:

5

Electrons:

38

CAS Number:

7440-24-6

Cost Per 100 Grams:

$30

Atomic Properties

Electronic Configuration:

[Kr] 5s²

Ion Charge:

+2

Ionisation Energies:

549 kJ/mol

Atomic Radius (Empirical):

215 pm

Atomic Radius (Calculated):

227 pm

Covalent Radius:

198 pm

Van Der Waals Radius:

303 pm

Ionisation Potential of An Atom:

5.695 eV

Electrons Per Layer:

2, 8, 18, 8, 2

Atomic Multiplicities Of The Gas:

1

Atomic Weight:

87.62

Reactivity

Electron Affinity:

−5 kJ/mol

Valence:

2

Electronegativity:

0.95

Thermal Properties

Melting Point:

777°C

Boiling Point:

1382°C

Critical Point:

Pressure: 2.35 MPa

Temperature: 1382°C

Thermal Conductivity:

0.35 W/(m·K)

Heat Capacity:

Specific: 0.302 J/(g·K)

Molar: 25.4 J/(mol·K)

Thermal Coefficient:

0.0001

Enthalpy:

Fusion: 11.8 kJ/mol

Vaporisation: 150 kJ/mol

Atomization: 200 kJ/mol

Curie Temperature:

N/A

Neel Temperature:

N/A

Superconductivity Point:

N/A

Physical and Chemical Properties

State of matter (25° C/ 77°F):

Solid

Density:

Solid: 2.64 g/cm³

Molar Volume (Vmol):

33.1 L/mol

Speed of Sound (Vs):

3000 m/s

Hardness:

N/A

Bulk Modulus (K):

20.0 GPa

Shear Modulus (G):

N/A

Young's Modulus (E):

N/A

Color:

Silvery-white

Brinell Hardness (MPa):

N/A

Liquid Density (Kg/m^3):

2.64 kg/m³

Hardness of Mohs:

N/A

Refractive Index:

N/A

Vickers Hardness (MPa):

N/A

Crystal Structure:

N/A

Electromagnetic Properties

Electrical Type:

Conductor

Resistivity:

10^-7 Ω·m

Magnetic Type:

Diamagnetic

Superconductivity:

Not applicable

Volume Magnetic Susceptibility:

-1.0 × 10^-9

Mass Magnetic Susceptibility:

-1.2 × 10^-9 m³/kg

Molar Mass Susceptibility:

-2.0 × 10^-8 m³/mol

Electrical Conductivity:

10^7 S/m

Mass (γ_mass):

1.0 × 10^-25 kg

Mass (γ_mol):

1.0 × 10^-22 mol

Volume (γ_vol):

33.1 L

Grid Parameters

Crystal Structure:

Body-centered cubic

Grid Parameters:

N/A

Attitude:

N/A

Debye Temperature:

N/A

Safety and Precautions

Signal Word:

Warning

Hazard Statements:

H260

Precautionary Statements:

P220, P244, P370 + P376

RTECS Number:

Not available

Risk:

Flammability: Highly flammable
Health Risk: Irritant
Reactivity: Stable
Specific Risk: None

Importance

Main sources:

Celestine, Strontianite

Main Usage:

Fireworks, magnets, medical applications

Nuclear Properties

Radioactive:

No

Isotopes:

Sr-84, Sr-86, Sr-87, Sr-88

Neutron Cross Sectional:

0.4 barns

Half Life (s):

None

Lifetime:

Stable

Prevalence

Universe:

0.0007%

Sun:

0.0007%

Oceans:

0.00001%

Humans:

0.00001%

Earth's Crust:

0.02%

Meteorites:

0.02%