Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...

For a reaction to occur, the particles that are reacting must collide with each other. Only some of all the collisions that take place cause a chemical change to happen. These are called ...

A new technique, based on a chain reaction of recognition and hybridization events between two sets of DNA hairpin molecules, offers an enzyme-free alternative for the rapid detection of specific ...

A new process for chemically recycling commercially available polymethacrylates under visible light has been discovered ...

However, these chemically complex materials are often ... those that release the most energy upon reacting. The first reaction results in an intermediate compound that then reacts with the ...