The halogen elements have seven valence electrons in their outermost electron shell. Therefore, when these elements can receive an electron from another atom, they form very stable compounds since their outermost shell is full.
How do halogens form compounds?
In combination with other nonmetals, the halogens form compounds through covalent bonding. In their elemental form, the halogens form diatomic molecules, X2, connected by single bonds. ... The halogens are extremely reactive (especially fluorine), and are not found naturally in their elemental forms.
Do halogens normally form compounds?
The halogens all form binary compounds with hydrogen, and these compounds are known as the hydrogen halides: hydrogen fluoride (HF), hydrogen chloride (HCl), hydrogen bromide (HBr), hydrogen iodide (HI), and hydrogen astatide (HAt).
