Which elements form diatomic molecules?

A diatomic element is a molecule of an element consisting of two atoms. It is a form of homonuclear diatomic molcule. There are only 7 diatomic elements in total and only 5 diatomic elements at standard temperature and pressure (). read more

All other diatomic molecules are chemical compounds of two different elements. Many elements can combine to form heteronuclear diatomic molecules, depending on temperature and pressure. Common examples include the gases carbon monoxide (CO), nitric oxide (NO), and hydrogen chloride (HCl). read more

Diatomic molecules consist of two atoms bonded together. In contrast, monatomic elements consist of single atoms (e.g., Ar, He). Many compounds are diatomic, such as HCl, NaCl, and KBr. Diatomic compounds consist of two different elements. There are seven pure elements that form diatomic molecules. This is a list of the seven diatomic elements. read more