| Name | boron |
|---|---|
| Symbol | B |
| Atomic Weight | 10.811 |
| Atomic Number | 5 |
| CAS ID | 7440-42-8 |
| Group Number | 13 |
| Group Name | (none) |
| Period Number | 2 |
| Origin of Name | Arabic, buraq |
| Year Discovered | 1808 |
| Discovery Credits | L. J. Lissac and L. J. Thenard in Paris, France and Sir Humphrey Davy in London, UK. |
| Class | Semi-Metallic |
| Color | black |
| Standard State | Solid at 77 F & 298 K |
| Description | Non-metal with several allotropes. Amorphous boron is a dark powder un-reactive
to oxygen, water, acids, and alkalis. Forms metal borides with most
metals. Used in borosilicate glass, detergents, and fire retardants.
Strong neutron capture ability is put to best use as a moderator for
nuclear reactions involving neutrons. Diagnostic tests: |