What type of elements are found in Group 17 of the periodic table?

Group 17 of the periodic table is known as the halogens. This group includes elements such as fluorine, chlorine, bromine, iodine, and astatine. Halogens are characterized by their high reactivity, especially with alkali metals, to form salts. They typically have seven electrons in their outermost electron shell, which drives their tendency to gain one electron to achieve a stable electron configuration similar to the noble gases. This high reactivity and tendency to form negative ions (anions) are key properties that define the halogens.

Understanding the classification of elements in the periodic table simplifies learning their properties and behaviors in chemical reactions, making it clear why halogens are grouped together based on their similar characteristics.