ATOMS ARE TINY, SOLID BALLS; ATOMS ARE POSITIVE 'PUDDING' WITH NEGATIVE 'PLUMS' IN THEM; ATOMS ARE MOSTLY EMPTY SPACE WITH A TINY, POSITIVE NUCLEUS; ELECTRONS ORBIT THE NUCLEUS IN SPECIFIC 'PLANETARY' LEVELS; THE ELECTRON ISN'T A 'THING,' IT'S A 90% PROBABILITY CLOUD IN A 3D ORBITAL