How do they know???

Question

how do people know that when you twist a double bond it breaks? Can you see the atoms or bond? also how do they actually twist the atoms atoms?

also in some cis- or trans- organic compound one causes instant explosion. How does this happen and does it form

Answer 1

Chemists use indirect evidence to determine many things. The atomic level is too small to observe so they depend on data gathered from experimentation and models which can explain the observed data.