Name: Strontium
Symbol: Sr
Atomic Number: 38
Atomic Mass: 87.62 amu
Melting Point: 769.0 °C (1042.15 °K, 1416.2 °F)
Boiling Point: 1384.0 °C (1657.15 °K, 2523.2 °F)
Number of Protons/Electrons: 38
Number of Neutrons: 50
Crystal Structure: Cubic
Density @ 293 K: 2.54 g/cm3
Color: yellowish
Atomic Structure
![[Bohr Model of Strontium]](b0038.gif) |
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-82 | 25.36 days |
| Sr-83 | 1.35 days |
| Sr-84 | Stable |
| Sr-85 | 64.84 days |
| Sr-85m | 1.27 hours |
| Sr-86 | Stable |
| Sr-87 | Stable |
| Sr-87m | 2.8 hours |
| Sr-88 | Stable |
| Sr-89 | 50.52 days |
| Sr-90 | 29.1 years |
| Sr-91 | 9.5 hours |
| Sr-92 | 2.71 hours |
| Sr-93 | 7.4 minutes |
Facts
Date of Discovery: 1790Discoverer: A. Crawford
Name Origin: After Strotian (a Scottish town)
Uses: flares, fireworks, crimson color
Obtained From: celestite, strontianite
Information provided by: http://www.chemicalelements.com