Question

If the outermost shell of an atom has eight electrons, it is called ………… and is chemically …………..

• A. Inert gas or Noble gas
• B. inactive or non-reactive

Answer 1

Noble gases — it is also known as inert gases or aerogens. these are the elements that belong to 18 of the modern periodic table

• the outermost shell of inert gas has eight electrons in their outermost shell
• it is chemically inactive or non-reactive in nature due to its full outer shells with electron
• they do not seek to gain or lose electrons through the process of bonding
• the noble gases are colorless, odorless, tasteless, nonflammable gases
• their melting and boiling points are close together giving them a very narrow liquid range

Thus, If the outermost shell of an atom has eight electrons, it is called Inert gas or noble gas and is chemically inactive or non-reactive