To be a creationist you must believe in god. As a chemist I do not see how any chemist can believe in god. If you believe the bible is true, then you have to believe in alchemy! Jesus is alleged to have converted water into wine. This means converting oxygen or hydrogen into carbon. For Jesus to walk on water a physicist would have to suspend belief that a body displaces its weight in water. Or believe that surface tension had increased at least a million times. Yet rational people still profess to believe in the Christian god. The only way for this to occur is for the brain to compartmentalize the two beliefs. Like multiple personalities do not know the others exist, when thinking about science religion does not exist and vice versa.
Using this same reasoning on all the other branches of science it becomes clear that no one who believes in science should believe in god.