Question

Перечислите аллотропные видоизменения селена, где их используют? укажите вид химической свзяи

Answer 1

Аморфный селен: красно-бурый порошок
Кристаллический селен: вещество серого цвета с металлическим блеском. Есть свойство: электропроводность ничтожна, но увеличивается при освещении. Используется в фотометрах, световых сигнализаторах

Answer 2

Allotropes of Selenium and Their Uses

Selenium is known to exist in several allotropes, which are different forms of the same element with varying physical and chemical properties. Here are some of the allotropes of selenium and their uses:

1. Amorphous Selenium (a-Se): Amorphous selenium is a non-crystalline form of selenium. It is primarily used in the production of photocopiers and xerographic machines. It is also used in the manufacturing of photovoltaic cells for solar panels.

2. Red Selenium (Se8): Red selenium is a stable form of selenium that consists of eight selenium atoms arranged in a ring structure. It is used in the production of glass and pigments. It is also used in the electronics industry for rectifiers and photoelectric cells.

3. Gray Selenium (Se): Gray selenium is the most common form of selenium. It has a metallic appearance and is used in the production of glass and ceramics. It is also used as a catalyst in various chemical reactions.

4. Black Selenium (Se): Black selenium is a less stable form of selenium that can be obtained by heating gray selenium. It is used in the production of certain types of photoelectric cells and photocopiers.

5. Vitreous Selenium (Se): Vitreous selenium is a glassy form of selenium that is obtained by rapidly cooling molten selenium. It is used in the production of photocopiers and xerographic machines.

6. Crystalline Selenium (Se): Crystalline selenium is a crystalline form of selenium that is used in the production of photovoltaic cells for solar panels. It has a higher efficiency in converting sunlight into electricity compared to amorphous selenium.

Please note that the chemical bonding in selenium allotropes can vary depending on the specific form. For more detailed information on the chemical bonding in each allotrope, further research is recommended.

I hope this information helps! Let me know if you have any more questions.