Boron
Videos
Boron is a chemical element; it has symbol B and atomic number 5. In its crystalline form it is a brittle, dark, lustrous metalloid; in its amorphous form it is a brown powder. As the lightest element
boron (β-rhombohedral)
Amorphous boron powder
Sassolite
Boron chunks
Beryllium
Videos
Beryllium is a chemical element; it has symbol Be and atomic number 4. It is a steel-gray, hard, strong, lightweight and brittle alkaline earth metal. It is a divalent element that occurs naturally on
Boron
…more) Appearance black-brown Standard atomic weight Ar°(B) [10.806, 10.821] 10.81±0.02 (abridged) Boron in the periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium…
Be 140g
Beryllium ore with a U.S. penny for scale
Emerald is a naturally occurring compound of beryllium.
A bead of beryllium from a melt