Mn
Manganese is a hard, brittle transition metal essential for steel production and biology.
Physical Properties
| পদাৰ্থ | 54.938 u |
| ঘনত্ব | 7.44 g/cm³ |
| Melting Point | 1519.0 K |
| উত্তাপৰ বিন্দু | 2334.0 K |
| আকৃতি | Silvery gray metallic |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 1.55 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 717.3 kJ/mol |
| ইলেকট্ৰন | -50.0 kJ/mol |
| Oxidation States | +1, +2, +3, +4, +5, +6, +7 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Ar] 3d5 4s2 |
| পৰমাণু | 127.0 pm |
| কোভালেন্ট বেৰিয়াড | 139.0 pm |
| Van der Waals Radius | 197.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Johan Gottlieb Gahn |
| আবিষ্কাৰৰ বছৰ | 1774 |
| অৱস্থান | Stockholm, Sweden |
| Named After | Latin 'magnes' meaning magnet, or Italian 'manganese' |
বিষয়ে Manganese
Manganese is a hard, brittle, silvery-gray metal often found with iron. It is essential for all living organisms as a cofactor for many enzymes. The oxygen-evolving complex in photosystem II uses manganese to split water.
Uses & Applications
Steel production, dry cell batteries, aluminum alloys, potassium permanganate, and glass decolorizer.
মজা কথা
Manganese is essential for photosynthesis -- without it, plants could not split water to produce the oxygen we breathe.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 55 | 1.0% | - | Yes |
ইলেকট্ৰন
[Ar] 3d5 4s2