Final answer:
Fluorine, chlorine, bromine, and iodine are halogens that share similar chemical properties, such as high reactivity with metals. They differ in their physical states at room temperature; with fluorine and chlorine as gases, bromine as a liquid, and iodine as a solid.
Step-by-step explanation:
The subject of the question relates to the properties and classification of a group of elements known as the halogens, which include fluorine, chlorine, bromine, and iodine. These elements are in Group 17 of the periodic table and are known for their high reactivity, particularly with metals, forming compounds like sodium chloride (table salt).
Out of the options given, the correct answer is that fluorine, chlorine, bromine, and iodine:
- D. have similar chemical properties.
This is because they are all halogens and exhibit high reactivity with metals. However, they do not all share the same physical state at room temperature; fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid. Moreover, while these elements share chemical similarities due to being in the same group, they do not have identical physical properties.