No.
Oxygen and hydrogen have diatomic molecules.
Yes, halogens form diatomic molecules.
liquids
Nitrogen (N2) is the group 15 element that exists as diatomic molecules.
Sodium is not diatomic. Sodium is a metallic element that typically exists as individual atoms in its elemental form. Diatomic molecules, on the other hand, are molecules made up of two atoms of the same element bonded together. An example of a diatomic molecule is diatomic oxygen (O2).
Diatomic molecules include hydrogen H2, oxygen O2, nitrogen N2, chlorine Cl2, fluorine F2, bromine Br2 and iodine I2; these are homonuclear diatomic molecules because they contain the same atoms. Heteronuclear diatomic molecules include hydrochloric acid HCl, carbon monoxide CO and nitric oxide NO.
The fact that hydrogen forms diatomic molecules makes it similar to the halogen family, which also consists of elements that typically exist as diatomic molecules in their natural state, such as chlorine and fluorine.
Diatomic means consisting of two atoms. In chemistry, diatomic molecules are molecules composed of only two atoms of the same or different chemical elements bonded together. Examples include oxygen (O2) and hydrogen (H2).
Potassium is not a diatomic element. Diatomic elements are those that naturally exist as molecules with two atoms bonded together, such as chlorine (Cl2), iodine (I2), and hydrogen (H2). Potassium (K) does not naturally form diatomic molecules.
The halogens and hydrogen
Bromine is the only element that is liquid and forms diatomic molecules Br2. Mercury is also an element and is liquid but is monoatomic.
There are seven diatomic molecules: H2, O2, N2, F2, Cl2, Br2, and I2. For anyone who does not know what a diatomic molecule is, in science, "di" means "two", and "atomic" obviously means "atoms". So a diatomic molecule is a molecule with two atoms of the same element. These seven diatomic molecules are the only ones that when combined, do not react. These are known as stable compounds. Hope this helps.