Across
- 5. An atom that is electrically charged
- 7. Materials that impede the free flow of electrons from atom to atom and molecule to molecule
- 8. Concentric spherical regions of space outside the nucleus
- 11. The charge possessed by an object is often expressed using the scientific unit known as
- 12. A non-contact force between charged objects
- 14. A force that pushes away
- 15. Invisible building blocks proposed by Greek philosophers
Down
- 1. A force that pulls toward
- 2. The process of separating opposite charges within an object
- 3. A densely packed core of positive charge
- 4. Any particle, whether an atom, molecule or ion, that contains less electrons than protons is
- 6. Materials that are extremely conductive
- 9. Any particle that contains more electrons than protons is
- 10. If an atom contains equal numbers of protons and electrons, the atom is described as
- 13. Materials that permit electrons to flow freely from particle to particle