![[ATOM]](atom.gif) |
Antimony
|
|
Information valid for Sb-122 unless otherwise noted
Basic Information
Symbol: Sb
Atomic Number: 51
Mass: 121.76
Melting Point: 630.0 C
Boiling Point: 1750.0 C
Number of Protons/Electrons: 51
Number of Neutrons: 71
Classification: Metalloid
Crystal Structure: Rhombohedral
Density @ 293 K: 6.684 g/cm3
Color: bluish
Atomic Structure
![[Bohr Model of Antimony]](b0051.gif) |
|
Number of Energy Levels: 5
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 18
Fifth Energy Level: 5
|
Isotopes
| Isotope |
Half Life |
| Sb-117 |
2.8 hours |
| Sb-119 |
38.1 hours |
| Sb-120 |
15.89 minutes |
| Sb-121 |
Stable |
| Sb-122 |
2.7 days |
| Sb-123 |
Stable |
| Sb-124 |
60.2 days |
| Sb-125 |
2.75 years |
| Sb-126 |
12.4 days |
| Sb-126m |
19.0 minutes |
| Sb-127 |
3.84 days |
| Sb-129 |
4.4 hours |
Facts
Date of Discovery: Known to the ancients
Discoverer: Unknown
Name Origin: From the Greek words anti (opposed) and monos
(solitude)
Symbol Origin: Greek
Uses: hardens lead, plastics, chemicals
Obtained From: stibnite, valentinite