Across
- 2. Electrically neutral particles in the nucleus
- 4. the particle in the nucleus with an electric charge of +1
- 5. the smallest particle of an element that retains the element's properties
- 7. a mixture composed of particles that are too small to see.
- 9. the area surrounding the nucleus where the electrons are found
Down
- 1. a pure substance that are composed of a single type of atom
- 2. The small, positively charged center of the atom
- 3. a pure substance composed of two or more different types of elements
- 6. with an electric charge of -1
- 8. particles that protons and neutrons are composed of