Across
- 3. atomic particle that has no charge
- 6. the smallest unit of matter
- 7. atomic particle with a negative charge
- 8. atomic particle that has a positive charge
- 9. another name for the group 0 gases
- 10. another name for the rows on the periodic table
Down
- 1. two or more elements that have been chemically combined
- 2. elements with similar properties are arranged into these on the periodic table
- 3. centre of an atom that contains protons and neutrons
- 4. another name for the group 7 gases
- 5. these elements conduct electricity, are shiny, and are found on the left of the periodic table