Sb
Antimony is a metalloid used since ancient times as a cosmetic and in flame retardants.
Physical Properties
| পদাৰ্থ | 121.76 u |
| ঘনত্ব | 6.685 g/cm³ |
| Melting Point | 903.78 K |
| উত্তাপৰ বিন্দু | 1860.0 K |
| আকৃতি | Silvery lustrous gray metallic |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 2.05 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 834.0 kJ/mol |
| ইলেকট্ৰন | 103.2 kJ/mol |
| Oxidation States | -3, +3, +5 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Kr] 4d10 5s2 5p3 |
| পৰমাণু | 133.0 pm |
| কোভালেন্ট বেৰিয়াড | 139.0 pm |
| Van der Waals Radius | 206.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Known since antiquity |
| অৱস্থান | Various (ancient Egypt) |
| Named After | Greek 'anti + monos' meaning not alone; symbol Sb from Latin 'stibium' |
বিষয়ে Antimony
Antimony is a lustrous gray metalloid found mainly as stibnite ore. Ancient Egyptians used antimony sulfide as eye cosmetics (kohl). It expands on cooling, a rare property shared with water and bismuth.
Uses & Applications
Flame retardants, lead-acid batteries, semiconductors, pewter, and bullets.
মজা কথা
Ancient Egyptians used antimony sulfide as eye makeup over 5,000 years ago, making it one of the earliest cosmetic ingredients.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 121 | 0.5721% | - | Yes |
| 123 | 0.4279% | - | Yes |
ইলেকট্ৰন
[Kr] 4d10 5s2 5p3