1. When an atom gains or loses electrons
When an atom gains or loses electrons. A positively or negatively charged atom.

2. Ion

3. Positively Charged Ion

5. Electric charges flowing continuously through a closed conducting loop.

6. Circuit

7. Negatively Charged Ion

9. The flow of electric charge.

10. Electric Current

11. How much electric potential energy an electron can gain.

12. Voltage

14. Complete Circuit

15. A rapid movement of electric charge from one place to another
A rapid movement of electric charge from one place to another. An example of this is lightning

16. Electric Discharge

17. A material in which electrons can not move easily from place to place.

18. Insulator

19. A circuit that has more than one path for the electric current to follow.

20. Parallel Circuit

21. A material that allows electrons to move easily through it.

22. Conductor

23. The measure of how difficult it is for electrons to flow through a material.

24. Resistance

25. The process of providing a pathway to drain excess energy into Earth.

26. Grounding

27. A circuit that has only one path for the electric current to follow.

28. Series Circuit