Element Name: Beryllium
Atomic Number: 4
Chemical Symbol: Be
Atomic Mass: 9.012182±0.000003u
Melting Point: 1560 [or 1287 °C (2349 °F)] K
Density: 1848 kg m^-3

Is a Metal, Metaloid, or Nonmetal? Metal.

Is it a Solid, Liquid, or Gas? Solid at 298 k.

What Period is it in? 2.

What Family or Group is it in? Alkaline Earth Metals.

By who? In what year? And where was it discovered? Nicholas Louis Vauquelin, in 1797, in France.

Description of how it is used in the modern world. Beryllium is a Group 2 Element. It is a Metal and has a high melting point. At ordinary temperatures, Beryllium ressists oxidation in air. Beryllium compounds are very toxic. Its ability to scratch glass is probably due to the formation of a thin layer of oxide. Aquamarine and Emerald are precious forms of the mineral Beryl, [Be₃Al₂(SiO₃)₆].