Electrostatics

2. In a ____ atom, there are the same number of protons and electrons.
5. Protons have a positive charge and electrons have a ___ charge.
7. The ____ force is greater than the force due to gravity!
9. Like charges _____.
10. To cause an object to be positive on one side and negative on the other.
14. A method to charge a conductor without contact.
15. Unlike the gravitational force, which only attracts, the electrical force both attracts and ____.
16. The electrostatic force between two charged objects is _____ proportional to the square of the distance between them.
18. Electrons have a tendency to transfer between ____ materials.
19. A method to charge an insulator or conductor by contact.
21. A net force causes an ___.

1. Materials that do not easily distribute charge across their surfaces, like plastic or glass.
3. Materials that easily distribute charge across their surfaces, like metals.
4. In a conductor, electrons can move ___.
6. The study of electricity at rest.
8. Opposite charges ____.
11. When an object is ____, it has gained a positive or negative charge.
12. Electrical charge is ____; it is never created or destroyed.
13. The force between two charges is ____ proportional to the product of the charges.
17. The negatively charged particle.
20. Gravitational force depends on mass, whereas the electrical force depends on ____.