Which of the following is not caused by a gravitational force?

A. Gas and Dust come together to form a planet
B. Planets orbit a star
C. Two atoms come together to form a molecule
D. Stars cluster together to form a galaxy

(science)

Respuesta :

C. Two atoms come together to form a molecule.
D.Two atoms come together to form a molecule. 

Why? because...

The force which holds the two atoms is electromagnetic force not strong nuclear force.