Properties of the Elements
Boron
Chemical Symbol 
Atomic Number 
Electron Configuration  1s2 2s22p1
Stable Phase at 298.15 K  hexagonal a variety of metastable forms exsist  
Density (298 K)
2.83 g/cc
Atomic Mass  10.811 
Young's Modulus, ksi
 
Melting Temperature, K
2300