Information valid for Sr-88 unless otherwise noted
[ATOM]

Strontium

 [ATOM]

Basic Information


Symbol: Sr
Atomic Number: 38
Mass: 87.62
Melting Point: 769
Boiling Point: 1384
Number of Protons/Electrons: 38
Number of Neutrons: 50
Classification: Alkaline Earth
Crystal Structure: Cubic
Density: 2.54
Color: yellowish

Atomic Structure

[Bohr Model of Strontium]  
Number of Energy Levels: 5

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 8
    Fifth Energy Level: 2

Isotopes

Isotope Half Life
Sr-8225.36 days
Sr-831.35 days
Sr-84Stable
Sr-8564.84 days
Sr-85m1.27 hours
Sr-86Stable
Sr-87Stable
Sr-87m2.8 hours
Sr-88Stable
Sr-8950.52 days
Sr-9029.1 years
Sr-919.5 hours
Sr-922.71 hours
Sr-937.4 minutes

Facts


Date of Discovery: 1790
Discoverer: A. Crawford
Name Origin: After Strotian (a Scottish town)
Uses: flares, fireworks, crimson color
Obtained From: celestite, strontianite

Related Links

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