O
Oxygen is the third most abundant element in the universe and essential for respiration in most life forms.
Physical Properties
| পদাৰ্থ | 15.999 u |
| ঘনত্ব | 0.001429 g/cm³ |
| Melting Point | 54.36 K |
| উত্তাপৰ বিন্দু | 90.2 K |
| আকৃতি | Colorless gas, pale blue liquid |
| State at Room Temp | Gas |
রাসায়নিক বৈশিষ্ট্যসমূহ
| ইলেকট্ৰোনেজেটিভিটি | 3.44 (Pauling) |
| 1- তম আইনাইজেশন শক্তি | 1313.9 kJ/mol |
| ইলেকট্ৰন | 140.98 kJ/mol |
| Oxidation States | -2, -1, +1, +2 |
প্ৰমাণপত্ৰৰ বৈশিষ্ট্য
| ইলেকট্ৰন | [He] 2s2 2p4 |
| পৰমাণু | 48.0 pm |
| কোভালেন্ট বেৰিয়াড | 66.0 pm |
| Van der Waals Radius | 152.0 pm |
ডিস্কভাৰী
| আবিষ্কাৰ কৰা হৈছে | Carl Wilhelm Scheele |
| আবিষ্কাৰৰ বছৰ | 1771 |
| অৱস্থান | Uppsala, Sweden |
| Named After | Greek 'oxy genes' meaning acid-forming |
বিষয়ে Oxygen
Oxygen is a highly reactive nonmetal and the most abundant element in Earth's crust. It readily forms oxides with most elements. Oxygen is essential for cellular respiration and combustion. The ozone layer protects life on Earth from ultraviolet radiation.
Uses & Applications
Steelmaking, medical breathing gas, welding and cutting, water treatment, rocket propellant, and chemical manufacturing.
মজা কথা
Oxygen is paramagnetic -- liquid oxygen is pale blue and can be suspended between the poles of a strong magnet.
আইসোটোপ
| Mass Number | অভাৱ | হাফ-লাইফ | Stable |
| 16 | 0.99757% | - | Yes |
| 17 | 0.00038% | - | Yes |
| 18 | 0.00205% | - | Yes |
ইলেকট্ৰন
[He] 2s2 2p4