Na
Sodium is a highly reactive alkali metal essential for nerve function and found in common table salt.
Physical Properties
| পদাৰ্থ | 22.99 u |
| ঘনত্ব | 0.971 g/cm³ |
| Melting Point | 370.87 K |
| উত্তাপৰ বিন্দু | 1156.0 K |
| আকৃতি | Silvery-white metallic |
| State at Room Temp | Solid |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 0.93 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 495.8 kJ/mol |
| ইলেকট্ৰন | 52.8 kJ/mol |
| Oxidation States | -1, +1 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Ne] 3s1 |
| পৰমাণু | 186.0 pm |
| কোভালেন্ট বেৰিয়াড | 166.0 pm |
| Van der Waals Radius | 227.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Humphry Davy |
| আবিষ্কাৰৰ বছৰ | 1807 |
| অৱস্থান | London, England |
| Named After | English 'soda'; symbol Na from Latin 'natrium' |
বিষয়ে Sodium
Sodium is a soft, silvery-white, highly reactive metal. It is the sixth most abundant element in Earth's crust. Sodium ions are essential for nerve signal transmission and muscle contraction. It was first isolated by Humphry Davy through electrolysis of sodium hydroxide.
Uses & Applications
Table salt (NaCl), street lighting, soap manufacturing, de-icing roads, baking soda, and as a coolant in nuclear reactors.
মজা কথা
Sodium reacts so violently with water that it can explode, yet the sodium ion is absolutely essential for human life.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 23 | 1.0% | - | Yes |
ইলেকট্ৰন
[Ne] 3s1