Lr
Lawrencium
উপাদান 103 · 266.12 u
Lawrencium is the last actinide with an anomalous electron configuration.
Physical Properties
| পদাৰ্থ | 266.12 u |
| ঘনত্ব | 15.6 g/cm³ |
| Melting Point | 1900.0 K |
| আকৃতি | Metallic (predicted) |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 1.3 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 470.0 kJ/mol |
| ইলেকট্ৰন | -30.04 kJ/mol |
| Oxidation States | +3 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Rn] 5f14 7s2 7p1 |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Albert Ghiorso, Torbjorn Sikkeland, Almon Larsh, Robert M. Latimer |
| আবিষ্কাৰৰ বছৰ | 1961 |
| অৱস্থান | Berkeley, California, USA |
| Named After | Named after Ernest O. Lawrence, inventor of the cyclotron |
বিষয়ে Lawrencium
Lawrencium is the last element in the actinide series. Its last electron goes into a 7p orbital rather than 6d, confirmed experimentally in 2015.
Uses & Applications
No practical applications. Scientific research only.
মজা কথা
Lawrencium's electron goes into a 7p orbital rather than 6d -- confirmed experimentally in 2015, a surprise for the actinides.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 260 | - | 2.7 minutes | No |
| 262 | - | 3.6 hours | No |
ইলেকট্ৰন
[Rn] 5f14 7s2 7p1