Question

group 16 elements have law ionization enthalpy than corresponding 15th group elements . why? write electronic configuration of selenium​

Answer 1

Answer:

Explanation:The chalcogens are the elements that belong to group 16 of the modern periodic table (or the oxygen family). The Chalcogens consist of five elements – oxygen, sulfur, selenium, tellurium, and polonium. It can be noted that the synthetic element livermorium (denoted by the symbol Lv) is also believed to belong to the chalcogen family. It can also be noted that it is not uncommon for oxygen to be excluded from the chalcogen family while generalizing their chemical properties since its chemical behaviour is quite different from the rest of the member elements.

All chalcogens have a total of 6 electrons in their respective valence shells. These elements are also known as ore-forming elements since a large number of metals are known to exist in the form of sulfides or oxides in the Earth’s crust. Many chalcogens are known to occur in different allotropes. For example, oxygen is known to have a total of 9 allotropes and sulfur is known to have over 20. However, it can be noted that only one allotrope of tellurium has been discovered so far