Answer;
Nitrogen
Explanation;
-Nitrogen is the element that may form diatomic molecules held together by triple covalent bonds.
-Nitrogen is an element that occurs as a diatomic molecule in its gaseous state. This element only exists in the diatomic form with triple bonds between the two atoms. Due to is small size and being non polar, it lacks inter-molecular forces and thus it is gaseous in nature.
-Other elements that are diatomic in their gaseous states includes; hydrogen, oxygen, chlorine, bromine, iodine and fluorine.