B
Boron is a metalloid essential for plant growth and used in many industrial applications.
Physical Properties
| পদাৰ্থ | 10.81 u |
| ঘনত্ব | 2.34 g/cm³ |
| Melting Point | 2349.0 K |
| উত্তাপৰ বিন্দু | 4200.0 K |
| আকৃতি | Black-brown crystalline solid |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 2.04 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 800.6 kJ/mol |
| ইলেকট্ৰন | 26.7 kJ/mol |
| Oxidation States | +1, +2, +3 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [He] 2s2 2p1 |
| পৰমাণু | 87.0 pm |
| কোভালেন্ট বেৰিয়াড | 84.0 pm |
| Van der Waals Radius | 192.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Joseph Louis Gay-Lussac, Louis Jacques Thenard |
| আবিষ্কাৰৰ বছৰ | 1808 |
| অৱস্থান | Paris, France |
| Named After | Arabic 'buraq' or Persian 'burah' meaning borax |
বিষয়ে Boron
Boron is a metalloid that exists in many polymorphs, with the most common being amorphous brown powder and black crystalline forms. It is an essential micronutrient for plants but toxic in excess. Boron compounds have been known for thousands of years. Pure boron was first produced in 1808.
Uses & Applications
Borosilicate glass (Pyrex), fiberglass insulation, laundry bleach (borax), semiconductor dopant, and neutron absorber in nuclear reactors.
মজা কথা
Boron nitride can form a structure nearly as hard as diamond and is sometimes called 'white graphene'.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 10 | 0.199% | - | Yes |
| 11 | 0.801% | - | Yes |
ইলেকট্ৰন
[He] 2s2 2p1