Across
- 5. 1 or 2 letters to name an element
- 6. brittle, not malleable or ductile, poor conductors
- 8. heating Endothermic cooling
- 10. the number of atoms must be the same on both sides of the equation
- 12. a substance that cannot chemically be broken down into a simpler substance
- 13. energy level or shell
- 17. electrons on outside layer of atoms, form bonds with other atoms
- 19. a substance formed when 2 or more chemicals are chemically bonded together
- 22. the ingredients produced after the reaction takes place
Down
- 1. mass of an element
- 2. made periodic table
- 3. gaseous elements with very low chemical reactivity, odorless, colorless, monatomic gases
- 4. carries a negative charge
- 7. characteristics of both metals and nonmetals
- 9. the ingredients present before the reaction begins
- 11. carries a positive charge
- 14. both the number of protons and electrons
- 15. carries a neutral charge
- 16. a vertical column of elements on the periodic table
- 18. a form of matter that may not be further broken down using any chemical means
- 20. solid, shiny, conductive, malleable, ductile
- 21. the center of an atom
- 22. a horizontal row of elements on the periodic table