اطلاعات پایه ای در مورد عناصر گروه سوم اصلی

Name: Boron
Symbol: B
Atomic Number: 5
Atomic Mass: 10.811 amu
Melting Point: 2300.0 °C (2573.15 K, 4172.0 °F)
Boiling Point: 2550.0 °C (2823.15 K, 4622.0 °F)
Number of Protons/Electrons: 5
Number of Neutrons: 6
Classification: Metalloid
Crystal Structure: Rhombohedral
Density @ 293 K: 2.34 g/cm³
Color: brownish

 

 

Atomic Structure

Number of Energy Levels: 2   First Energy Level: 2 Second Energy Level: 3

 

Isotopes

Isotope	Half Life
B-10	Stable
B-11	Stable

 

Facts

Date of Discovery: 1808
Discoverer: Sir Humphry Davy, J.L Gay-Lussac
Name Origin: From borax and carbon
Uses: heat resistant alloys
Obtained From: kernite

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