5

B

Boron
10.81
 Historical Information

Boron compounds have been known for thousands of years, but the element was not isolated until 1808 by Sir Humphry Davy, Joseph-Louis Gay-Lussac (1778-1850) and Louis Jaques Thenard (1777-1857).
Basic Information Shells
  • Name:Boron
  • Symbol: B
  • Atomic number: 5
  • Atomic weight: 10.81
  • Standard state: solid at 298 K
  • Group in periodic table: 13
  • Group name: none
  • Period in periodic table: 2
  • Block in periodic table: p-block
  • Classification: Semi-metallic
 boron
Uses Trivia
  • boron compounds show promise in treating arthritis
  • lightweight compounds used for aerospace structures

Crystalline boron is inert chemically and is resistant to attack by boiling HF or HCl. When finely divided it is attacked slowly by hot concentrated nitric acid.