Describe in your own words the structure of an atom.

An atom is the smallest unit of a chemical element that retains the properties of that element. It is composed of three types of subatomic particles: protons, neutrons, and electrons.

1. Protons: These are positively charged particles located in the nucleus (center) of the atom. The number of protons in an atom determines the atomic number and identifies the type of element it is.

2. Neutrons: These are neutral particles, meaning they have no charge. They are also located in the nucleus of the atom. The number of neutrons in an atom contributes to its atomic mass.

3. Electrons: These are negatively charged particles that orbit the nucleus in different energy levels, often visualized as a cloud around the nucleus. The number of electrons in a neutral atom is equal to the number of protons.

The nucleus (made up of protons and neutrons) is very dense and makes up most of the atom's mass. However, the atom is mostly empty space, with the electrons orbiting far from the nucleus. Despite their small size, atoms combine to form molecules, which make up everything in the world around us.