Beryllium

Statistics:

• Name: Beryllium
• Symbol: Be
• Classification: Alkaline Earth Metal
• Atomic Number: 4
• Atomic Mass: 9.012182 g/mol
• Density: 1.85 g/cm³
• Melting: 1278°C
• Boiling: 2970°C
• Protons & Electrons:4
• Neutrons:5
• Discovered: 1797
• Discovered By: Vauquelin
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 2

Isotopes:

Isotope: Half-life

• ⁷Be: 53.12 days
• ⁹Be: stable
• ¹⁰Be: 1.51 million years

Brief Summary

Beryllium is a Alkaline Earth Metal with the symbol 'Be' and contains 4 Protons & Electrons with 5 neutrons in the nucleus of the atom. Beryllium has an atomic mass of 9.012182 g/mol and, at a temperature of 20°C, has a density of 1.85 g/cm³. It will melt at a temperature of 1278°C and boil at 2970°C.

Beryllium was discovered by Vauquelin in 1797 and is named 'Beryllium' From the mineral beryl.

Some common usages for Beryllium: spacecraft, missiles, aircraft.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Beryllium :: Be :: 4 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/beryllium.html>.