Electrical charges

All matter consists of atoms. Atoms contain three types of smaller particles: protons, neutrons and electrons. Of these three, both the protons and electrons are charged.

Protons are positively charged. Electrons are negatively charged.

Objects that are charged can affect other charged objects using the non-contact forces of static electricity.

Image of bohr atom model with two energy levels, black dot in centre is the nucleus, two electrons in the first energy level and one electron in the second energy level.Electrons orbit a nucleus

Generally, the atom has a neutral charge, but if it loses an electron, it becomes positively charged and if the atom gains an electron, it becomes negatively charged. Charged atoms are called 'ions'.