Across
- 1. the coloumns of the periodic table
- 4. The positively charged part of the atom
- 7. where all the elemnts are organized
- 10. the first person to organize the elemnts into the periodic table
- 11. The negatively charged part of an atom
- 13. the rows of the periodic table
- 15. the neutral part of the atom
Down
- 2. A substance that reacts with another
- 3. A colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain
- 5. inert gases
- 6. A new substance produced by a chemical reaction
- 8. A substance made up of one kind of atom; it cannot be broken down
- 9. The center of an atom that contains protons and neutrons
- 12. A substance made up of two or more elements chemically combined
- 14. The smallest unit of an element