The group of elements that includes fluorine and chlorine is known as the ______.

The group of elements that includes fluorine and chlorine is known as the ______.

• A. Noble Gases
• B. Alkali Metals
• C. Halogens
• D. Transition Metals

Answer: (C)

Fluorine and chlorine sit in a family of elements that have seven electrons in their outer shell and tend to gain one more to complete their octet, making them highly reactive nonmetals. They exist as diatomic molecules in usual conditions and form salts with metals easily. This group is called the Halogens, located in Group 17 of the periodic table. They are distinct from the inert noble gases, the reactive metals of the alkali metal group, and the metal-rich transition metals with multiple oxidation states, which is why Halogens is the best fit.

Fluorine and chlorine sit in a family of elements that have seven electrons in their outer shell and tend to gain one more to complete their octet, making them highly reactive nonmetals. They exist as diatomic molecules in usual conditions and form salts with metals easily. This group is called the Halogens, located in Group 17 of the periodic table. They are distinct from the inert noble gases, the reactive metals of the alkali metal group, and the metal-rich transition metals with multiple oxidation states, which is why Halogens is the best fit.