Ac
Actinium
উপাদান 89 · 227.02775 u
Actinium is the namesake of the actinide series and glows blue in the dark.
Physical Properties
| পদাৰ্থ | 227.02775 u |
| ঘনত্ব | 10.07 g/cm³ |
| Melting Point | 1323.0 K |
| উত্তাপৰ বিন্দু | 3471.0 K |
| আকৃতি | Silvery-white metallic |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 1.1 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 499.0 kJ/mol |
| ইলেকট্ৰন | 33.77 kJ/mol |
| Oxidation States | +2, +3 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Rn] 6d1 7s2 |
| পৰমাণু | 195.0 pm |
| Van der Waals Radius | 260.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Friedrich Oskar Giesel, Andre-Louis Debierne |
| আবিষ্কাৰৰ বছৰ | 1899 |
| অৱস্থান | Paris, France |
| Named After | Greek 'aktis' meaning ray or beam |
বিষয়ে Actinium
Actinium is a soft, silvery-white radioactive metal that glows blue due to its intense radioactivity ionizing the surrounding air. Actinium-225 is being researched for targeted alpha therapy against cancer.
Uses & Applications
Neutron sources, cancer research (actinium-225), and thermoelectric generators.
মজা কথা
Actinium is so radioactive it visibly glows blue in the dark from ionizing the surrounding air.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 225 | - | 10.0 days | No |
| 227 | - | 21.772 years | No |
ইলেকট্ৰন
[Rn] 6d1 7s2