A very small particle that hangs out in the center of an atom. It's one of the building blocks of stuff in the universe. It's special because they have a positive charge, and along with neutrons, they make up the center of an atom called the nucleus.  It's positive.

A very small particle that lives in the center of an atom, alongside protons. It's one of the tiny bits that make up everything around us. It's special because they don't have any charge. It's neutral.

A very small particle that zips around the center of an atom. It's one of the essential parts that make up everything in the world. They have a negative charge and whiz around the nucleus (the atom's center) in specific paths, kind of like tiny speedy travelers.  They’re negative.

A group of two or more atoms that are held together by chemical bonds.

A substance that is made up of only one kind of atom and cannot be broken down into simpler substances by chemical means.

A force that holds atoms together in a molecule or a compound.

A substance that is made up of two or more different kinds of atoms that are chemically combined in a fixed ratio.  The atoms bond together to form a new substance with different properties from its individual elements.

A simplified way to understand how electrons move around an atom. It pictures the atom like a mini solar system, with a nucleus at the center (made of protons and neutrons) and electrons orbiting around it in specific energy levels or shells.