"Write chemical reactions" four ammonia molecules (NH3) react with four oxygen molecules(O2) to form four nitrogen monoxide molecules (NO) and six water molecules. all substances are in gaseous state and heat is released in the chemical reaction

In any atom of any element, you will find protons and neutrons in the nucleus of any atom 

Answer    "a salt" would be the best answerexplanationsalts can be defined as ionic compounds that are neither acids nor bases. nacl is an example of a salt, and its ionic.an enzyme is an organic compound which is covalently bonded, not ionically bonded.acids are generally held together by covalent bondsan element does not need any bonds to exist