Which ions do halogenides usually form?

Halogenides, or halides, typically form when halogens (which are elements in Group 17 of the periodic table) combine with metals. Halogens readily gain electrons to achieve a stable electronic configuration, often forming negatively charged ions known as halide ions (such as fluoride, chloride, bromide, and iodide). When a halogen reacts with a metal, the metal donates electrons and becomes a positively charged metal ion, while the halogen gains these electrons to form the corresponding halide ion.

This electron transfer reaction between metals and halogens is fundamental to the formation of halogenides. The strong ionic bonds formed between the positively charged metal ions and the negatively charged halide ions create various compounds known as halides (such as sodium chloride). Understanding the nature of these ion formations is crucial in the study of inorganic chemistry and the behavior of elements in different groups of the periodic table.