Answer:
See explanation
Explanation:
The seven elements that form diatomic molecules are:
Hydrogen (H) => H₂
Nitrogen (N) => N₂
Oxygen (O) => O₂
Fluorine (F) => F₂
Chlorine (Cl) => Cl₂
Bromine (Br) => Br₂
Iodine (I) => I₂
How to remember the '7' diatomics => look at periodic table and draw a horizontal line starting at Nitrogen (N) through Fluorine (F), then a vertical line from Fluorine (F) through Astatine (As). The lines drawn make the number '7'. One only need to remember Hydrogen (H) also belongs to the set of elements forming diatomic molecules.
