Across
- 1. The center of an atom and contains most of its mass
- 2. It is one of three main particles that make up the atom with negative electrical charge
- 4. It is one of three main particles that make up the atom with positive electrical charge
- 5. The smallest part in matter
Down
- 1. It is one of three main particles that make up the atom with no electrical charge
- 3. The location of electrons in an atom