Astronauts make concrete in space for the first time
https://edition-m.cnn.com/2019/09/10/world/astronaut-cement-space-station-scn-trnd/index.html?r=https%3A%2F%2Fedition.cnn.com%2F
Chemical reactions without gravity are interesting in some cases. But, when it comes to reactions between atoms whose electrons are moving radically regardless of gravity, I guess gravity won't affect reaction mechanisms at all.
So, there would be a few chemical reactions which behave differently in space.
