The elements that have completely filled outermost shells are Noble gases (D).

Here's why:

A. Nonmetals: Nonmetals do not have completely filled outermost shells. They tend to gain electrons to achieve a stable electron configuration.

B. Metals: Metals do not have completely filled outermost shells. They tend to lose electrons to achieve a stable electron configuration.

C. Halogens: Halogens do not have completely filled outermost shells. They have seven electrons in their outermost shell and tend to gain one electron to achieve a stable electron configuration.

D. Noble gases: Noble gases have completely filled outermost shells. This is why they are stable and do not readily react with other elements.

Question

The elements that have completely filled outermost shells are Noble gases (D).

Here's why:

A. Nonmetals: Nonmetals do not have completely filled outermost shells. They tend to gain electrons to achieve a stable electron configuration.

B. Metals: Metals do not have completely filled outermost shells. They tend to lose electrons to achieve a stable electron configuration.

C. Halogens: Halogens do not have completely filled outermost shells. They have seven electrons in their outermost shell and tend to gain one electron to achieve a stable electron configuration.

D. Noble gases: Noble gases have completely filled outermost shells. This is why they are stable and do not readily react with other elements.

Knowee AI · Accepted Answer

The elements that have completely filled outermost shells are Noble gases (D).

Here's why:

A. Nonmetals: Nonmetals do not have completely filled outermost shells. They tend to gain electrons to achieve a stable electron configuration.

B. Metals: Metals do not have completely filled outermost shells. They tend to lose electrons to achieve a stable electron configuration.

C. Halogens: Halogens do not have completely filled outermost shells. They have seven electrons in their outermost shell and tend to gain one electron to achieve a stable electron configuration.

D. Noble gases: Noble gases have completely filled outermost shells. This is why they are stable and do not readily react with other elements.

Which of the following have completely filled outermost shells?ANonmetalsBMetalsCHalogensDNoble gases

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