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# Characteristics of an Atom Atoms are made of subatomic particles. Two important subatomic particles are: * **Protons:** Positive electrical charge * **Electrons:** Negative electrical charge * **Neutrons:** No electrical charge ## Arrangement of Subatomic Particles * **Protons** and **...

# Characteristics of an Atom Atoms are made of subatomic particles. Two important subatomic particles are: * **Protons:** Positive electrical charge * **Electrons:** Negative electrical charge * **Neutrons:** No electrical charge ## Arrangement of Subatomic Particles * **Protons** and **Neutrons** are closely grouped at the center of the atom, forming the **nucleus**. * **Electrons** move around the nucleus. ## Mass of Subatomic Particles * **Protons** and **Neutrons** have similar mass. * **Electrons** have almost no mass compared to protons and neutrons. # Diagram A simple diagram of an atom is provided. It shows electrons orbiting a central nucleus containing protons and neutrons. The diagram is hand-drawn and labels the different particles.