NSES Content Standard B 
Physical Science: Motions and forces
Grades 9-12, page 180

Between any two charged particles, electric force is vastly greater than the gravitational force. Most observable forces such as those exerted by a coiled spring or friction may be traced to electric forces acting between atoms and molecules.

Benchmark 4G The Physical Setting: Forces of Nature
Grades 9-12, page 96
Electromagnetic forces acting within and between atoms are vastly stronger than the gravitational forces acting between the atoms. At the atomic level, electric forces between oppositely charged electrons and protons hold atoms and molecules together and thus are involved in all chemical reactions. On a larger scale, these forces hold solid and liquid materials together and act between objects when they are in contact--as in sticking or sliding friction.