اطلاعات پایه ای در مورد عناصر گروه دوم اصلی

Name: Beryllium
Symbol: Be
Atomic Number: 4
Atomic Mass: 9.012182 amu
Melting Point: 1278.0 °C (1551.15 K, 2332.4 °F)
Boiling Point: 2970.0 °C (3243.15 K, 5378.0 °F)
Number of Protons/Electrons: 4
Number of Neutrons: 5
Classification: Alkaline Earth
Crystal Structure: Hexagonal
Density @ 293 K: 1.8477 g/cm³
Color: gray

 

 

Atomic Structure

Number of Energy Levels: 2   First Energy Level: 2 Second Energy Level: 2

 

Isotopes

Isotope	Half Life
Be-7	53.3 days
Be-9	Stable
Be-10	2600000.0 years

 

Facts

Date of Discovery: 1798
Discoverer: Fredrich Wohler
Name Origin: From the mineral beryl
Uses: spacecraft, missiles, aircraft
Obtained From: beryl, chrysoberyl

---