Question

Why is neon and argon placed in group 18 of the periodic table?

Answer 1

Answer:

Explanation:

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Answer 2

Neon and Argon are placed in group 18 of the periodic table because of their complete outermost electron shell stability.

• Neon (Ne) and Argon (Ar) are placed in group 18 of the periodic table, also known as the noble gases group, because they have a complete outermost electron shell, which makes them very stable and unreactive.
• Noble gases are characterized by having a filled valence electron shell, which means they have the maximum number of electrons that can occupy their outermost energy level.
• This stable electron configuration makes them very unreactive, as they have little tendency to gain or lose electrons to form chemical bonds with other elements.
• Neon and argon have eight electrons in their outermost energy level, which means they have a full valence shell, making them highly stable and unreactive.
• This configuration is sometimes referred to as the "octet rule," as it means that the outermost energy level is filled with eight electrons.
• In summary, Neon and Argon are placed in group 18 of the periodic table because they have a complete outermost electron shell, making them highly stable and unreactive, which is a defining characteristic of noble gases.

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