Sb
Antimony (Atomic Number 51)
Category: metalloid | Period 5, Group 15 | Block: p
Lustrous gray metalloid enhancing lead alloy hardness.
Atomic & Physical Constants
- Standard Atomic Weight:
- 121.7601 u
- Standard State Phase:
- Solid
- Electron Configuration:
- 2, 8, 18, 18, 5
- Electronegativity (Pauling):
- 2.05
- Melting Point:
- 903.78 K
- Boiling Point:
- 1908 K
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Flame retardant synergist, lead-acid batteries, microelectronics
Discovery History
Discovered by unknown, before 3000 BC.
Study Antimony with Socratic AI Tutor
Get step-by-step orbital hybridization, oxidation state derivations, and reaction practice questions.