how can two different elements be same.
sulfur is more reactive than selenium
This is a "decomposition" reaction.
Selenium and sulfur are both chalcogens and can form covalent bonds with each other. In their compounds, they are more likely to form covalent bonds rather than ionic bonds due to their similar electronegativities. The bond between selenium and sulfur would likely be a covalent bond.
Selenium has the largest atom among phosphorus, sulfur, and selenium because of its larger atomic radius. This is due to selenium having more electron shells and thus a greater distance from the nucleus.
Selenium
This element is selenium.
chalcogens
This element is selenium.
Selenium was named after the Greek word "selene," which means moon. This is because selenium's properties were found to be similar to tellurium, which was named after the Earth, and sulfur, which was named after the Sun. The name selenium reflects its position in the same chemical group as tellurium and sulfur.
carbon, nitrogen, oxygen, sulfur,selenium, and phosphorus are all in the same group
The other family members of Oxygen are Sulfur, Selenium, Tellunum, and Plutonium.
Sulfur and selenium form a covalent bond when they bond together, as both are nonmetals. In a covalent bond, the atoms share electron pairs to achieve a stable configuration.