Bor
5
B
Guruh
13
Davr
2
Block
p
Protonlar
Elektronlar
Neytronlar
5
5
6
General Properties
Atom raqami
5
Atom massasi
10,811
Mass Number
11
Turkum
Yarim metallar
Ranggi
Qora
Radioaktivlik
Yoʻq
From the Arabic word Buraq, Persian Burah
Crystal Structure
Simple Trigonal
Tarix
Boron compounds have been known for thousands of years, but the element was not discovered until 1808 by Sir Humphry Davy and by Gay-Lussac and Thenard.
Boron was not recognized as an element until it was isolated in 1808 by Sir Humphry Davy and by Joseph Louis Gay-Lussac and Louis Jacques Thénard.
Jöns Jakob Berzelius identified boron as an element in 1824.
Boron was not recognized as an element until it was isolated in 1808 by Sir Humphry Davy and by Joseph Louis Gay-Lussac and Louis Jacques Thénard.
Jöns Jakob Berzelius identified boron as an element in 1824.
Electrons per shell
2, 3
Elektron konfiguratsiyasi
[He] 2s2 2p1
Boron is an essential nutrient for all green plants
Physical Properties
Phase
Qattiq modda
Zichlik
2,34 g/cm3
Erish harorati
2349,15 K | 2076 °C | 3768,8 °F
Qaynash harorati
4200,15 K | 3927 °C | 7100,6 °F
Heat of Fusion
50 kJ/mol
Heat of Vaporization
507 kJ/mol
Solishtirma issiqlik sigʻimi
1,026 J/g·K
Abundance in Earth's crust
0,00086%
Abundance in Universe
1×10-7%
CAS Number
7440-42-8
PubChem CID Number
5462311
Atomic Properties
Atom radiusi
90 pm
Kovalentlik radiusi
84 pm
Elektrmanfiylik
2,04 (Poling boʻyicha)
Ionization Potential
8,298 eV
Molyar hajm
4,6 cm3/mol
Issiqlik oʻtkazuvchanlik
0,274 W/cm·K
Oksidlanish darajasi
1, 2, 3
Applications
Boron oxide is used in glassmaking and ceramics.
Borax is used in making fiberglass, as a cleansing fluid, a water softener, insecticide, herbicide and disinfectant.
Boric acid is used as a mild antiseptic and as a flame retardant.
Boron shielding is used as a control for nuclear reactors.
Borax is used in making fiberglass, as a cleansing fluid, a water softener, insecticide, herbicide and disinfectant.
Boric acid is used as a mild antiseptic and as a flame retardant.
Boron shielding is used as a control for nuclear reactors.
Elemental boron, boron oxide, boric acid, borates and many organoboron compounds are non-toxic
Izotoplar
Barqaror izotoplar
10B, 11BBeqaror izotoplar
7B, 8B, 9B, 12B, 13B, 14B, 15B, 16B, 17B, 18B, 19B