How dangerous are reactants in a chemical reaction?

This is not the most dangerous chemical reaction if the setting is a lab with exotic chemicals, but you need go no farther than your cleaning closet to find agents capable of an extremely dangerous reaction. Bleach and ammonia mixed together create Chlorine gas, chloramine, and other toxic chemicals which are easily fatal, toxic, and explosive. read more

In a chemical reaction, substances (elements and/or compounds) called reactants are changed into other substances (compounds and/or elements) called products. You can’t change one element into another in a chemical reaction — that happens in nuclear reactions. Instead, you create a new substance with chemical reactions. read more