Question

Why does atoms and molecules have round shape

Answer 1

Answer:

The easy answer is that atoms are not spherical or circular in shape. Sphere is a solid object, atoms to not have well defined boundaries with "solid cutoffs". Atoms are more like clouds consisting distributions of electrons, neutrons and protons.

Answer 2

Answer:The shape of the atom depends on several factors, including the angular momentum of electrons and the electrostatic forces between atomic particles...

It is not true that all atoms exhibit spherical shape; only the simplest of the atoms have that shape. Heavy atoms have more complex shapes...