All matter is made up of atoms, and atoms are made up of smaller particles called protons, neutrons and electrons. The center or nucleus of an atom is made up of protons and neutrons. The electrons orbit around the nucleus just like the moon orbits around the earth. Electrons have a negative charge, while protons have a positive charge and neutrons are neutral (i.e., they have no charge).

Electricity is created when particles become charged. Some are negatively charged (electrons), and some are positively charged (protons). These opposite charges attract, whereas particles with similar charges repel each other.

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