Ar
Argon is the most abundant noble gas in Earth's atmosphere, comprising nearly 1% of the air.
Physical Properties
| পদাৰ্থ | 39.948 u |
| ঘনত্ব | 0.0017837 g/cm³ |
| Melting Point | 83.8 K |
| উত্তাপৰ বিন্দু | 87.3 K |
| আকৃতি | Colorless gas |
| State at Room Temp | Gas |
রাসায়নিক বৈশিষ্ট্যসমূহ
| 1- তম আইনাইজেশন শক্তি | 1520.6 kJ/mol |
| ইলেকট্ৰন | -96.0 kJ/mol |
| Oxidation States | 0 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [Ne] 3s2 3p6 |
| পৰমাণু | 71.0 pm |
| কোভালেন্ট বেৰিয়াড | 106.0 pm |
| Van der Waals Radius | 188.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Lord Rayleigh, William Ramsay |
| আবিষ্কাৰৰ বছৰ | 1894 |
| অৱস্থান | London, England |
| Named After | Greek 'argon' meaning lazy or inactive |
বিষয়ে Argon
Argon is a colorless, odorless noble gas making up 0.934% of Earth's atmosphere. It is produced primarily by radioactive decay of potassium-40. Argon is completely inert under normal conditions and was the first noble gas to be discovered.
Uses & Applications
Welding shielding gas, incandescent and fluorescent lighting, insulating gas in windows, and preservation of historic documents.
মজা কথা
Argon got its name from the Greek word for 'lazy' because it participates in virtually no chemical reactions.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 36 | 0.003336% | - | Yes |
| 38 | 0.000629% | - | Yes |
| 40 | 0.996035% | - | Yes |
ইলেকট্ৰন
[Ne] 3s2 3p6