Across
- 4. soap is one of this substance
- 6. cannot be broken down into another substance by chemical or physical means
- 8. i made the periodic table
- 9. elements found along the zig zag line in the periodic table
- 13. in the nucleus of an atom it is stable, but when its free it decays
- 14. thiscompound are gases at room temperature
- 15. any atom with some protons but different number of neutrons
- 17. water is a ____ for sugar
- 18. the smallest particle that has properties of an element
Down
- 1. vertical column of elements
- 2. a collection of particles with 2 or more substance that are chemically united
- 3. the number of protons and electrons in the nucleus of an atom equals _____
- 5. another name for group
- 6. this substance particle is negatively united
- 7. "C" is its symbol
- 10. homogeneous mixture of 2 or more substances
- 11. "malleable" is a physical property of
- 12. the lightest and most stable baryon
- 16. substance dissolved in a solution