Across
- 1. change chemically
- 5. materials that allow heat and electricity to pass through
- 7. a column in the periodic table
- 9. people who find new ways to use elements and compounds
- 11. a substance that cannot split into simpler substances
- 12. the mass per unit volume of a substance
- 14. a row in the periodic table
Down
- 2. change a change in matter that results in the formation of a new substance
- 3. giving off high-energy particles
- 4. positively charged nucleus
- 6. imaginary paths around the nucleus of an atom
- 8. any substance from which something can be made
- 10. negatively charged nucleus
- 13. the center part of an atom, which contains protons and neutrons