Halogens are special elements found in Group 7 of the periodic table. They include five important members: fluorine, chlorine, bromine, iodine, and astatine. Let's take a closer look at some of their key features:

1. Reactivity:

   • Halogens become less reactive as you move down the group. For example, fluorine is very reactive, while iodine is much less so.

2. Melting and Boiling Points:

   • The melting and boiling points go up as you go down the group. Chlorine is a gas at room temperature, but iodine is a solid and has a much higher melting point.

3. Color:

   • Each halogen has a unique color. Fluorine is a pale yellow, chlorine looks greenish-yellow, and iodine appears purple-black.

By learning about these traits, we can better understand how halogens act and how they interact with other elements!