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 ...

The experiment involved custom-building a small chamber that simulated hot spring environments on early Earth.

Hey chemheads, did you know Reactions doesn’t just make awesome videos? We also make infographics. Check out our collection below. And see the Periodic Graphics collection on the C&EN website.

Chain of Thought illustrates how prompt structure, when thoughtfully crafted, can guide AI into deeper and more deliberate ...

Rebecca Trager speaks to a US team developing a sign language lexicon for chemistry concepts that combines form with meaning ...