As
Arsenic (Atomic Number 33)
Category: metalloid | Period 4, Group 15 | Block: p
Toxic metalloid historically used as poison and wood preservative.
Atomic & Physical Constants
- Standard Atomic Weight:
- 74.9215956 u
- Standard State Phase:
- Solid
- Electron Configuration:
- 2, 8, 18, 5
- Electronegativity (Pauling):
- 2.18
- Melting Point:
- N/A
- Boiling Point:
- N/A
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
GaAs semiconductors, lead-acid battery alloys, wood preservatives
Discovery History
Discovered by Bronze Age (1250).
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