Across
- 1. The quantity of matter contained in an atom of an element
- 3. A solid material that is typically hard, shiny
- 7. The number of protons in the nucleus of an atom
- 9. A small particle with a negative charge.
- 10. The number of. atoms of that element.
Down
- 2. A substance made from two or more different elements that have been chemically joined.
- 4. A small, positively charged particle of matte
- 5. Anything that takes up space.
- 6. The particles in an atom that have a neutral charge.
- 8. The branch of science that deals with the properties, composition, and structure of elements and compounds.