Across
- 2. The central part of an atom containing protons and neutrons (6)
- 5. A mixture where one substance is dissolved in another (8)
- 10. Process where a substance changes from a gas to a liquid (10)
- 11. The type of bond formed when electrons are shared between atoms (7)
Down
- 1. The negatively charged particle that orbits the nucleus (8)
- 3. Substance composed of two or more elements chemically combined (4)
- 4. The smallest unit of an element that retains its chemical properties (4)
- 6. Crossword — 9th Grade
- 7. A horizontal row in the periodic table (3)
- 8. A positively charged ion (4)
- 9. Key (for teacher) Across
- 12. The number of protons in an atom's nucleus; defines the element (6)